<?php
/** @license MIT
 * Copyright 2023 J. King
 * See LICENSE and AUTHORS files for details */

declare(strict_types=1);

namespace MensBeam\HTML;

/** An implementation of the W3C HTML Sanitizer API.
 * 
 * The class implements the following methods:
 * 
 * - constructor
 * - sanitize
 * - sanitizeFor
 * - getConfiguration
 * - getDefaultConfiguration
 * 
 * @see https://wicg.github.io/sanitizer-api/
 * @see https://github.com/WICG/sanitizer-api/issues
 */
abstract class AbstractSanitizer {
    /** @var int The sanitizer action to keep a node */
    protected const ACTION_KEEP = 0;
    /** @var int The sanitizer action to drop a node, which removes it and its children */
    protected const ACTION_DROP = 1;
    /** @var int The sanitizer action to block a node, which removes it while (possibly) keeping its children; this only applies to element nodes */
    protected const ACTION_BLOCK = 2;
    /** @var int The "unknown" kind for elements and attributes */
    protected const KIND_UNKNOWN = 0;
    /** @var int The "regular" kind for elements and attributes */
    protected const KIND_REGULAR = 1;
    /** @var string The HTML namespace */
    protected const HTML_NAMESPACE = "http://www.w3.org/1999/xhtml";
    /** @var string The MathML namespace */
    protected const MATHML_NAMESPACE = "http://www.w3.org/1998/Math/MathML";
    /** @var string The SVG namespace */
    protected const SVG_NAMESPACE = "http://www.w3.org/2000/svg";
    /** @var string The XLink namespace */
    protected const XLINK_NAMESPACE = "http://www.w3.org/1999/xlink";
    /** @var string The XML namespace */
    protected const XML_NAMESPACE = "http://www.w3.org/XML/1998/namespace";
    /** @var string The XMLNS namespace */
    protected const XMLNS_NAMESPACE = "http://www.w3.org/2000/xmlns/";
    /** @var string The null namespace; we use the empty string because it is explicitly not a valid namespace name; see https://www.w3.org/TR/REC-xml-names/#iri-use */
    protected const NULL_NAMESPACE = "";
    /** @var array The set of known elements, used to determine what the `allowUnknownMarkup` setting applies to */
    protected const KNOWN_ELEMENTS = [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "defs", "desc", "discard", "ellipse", "feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDistantLight", "feDropShadow", "feFlood", "feFuncA", "feFuncB", "feFuncG", "feFuncR", "feGaussianBlur", "feImage", "feMerge", "feMergeNode", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "mask", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"], self::HTML_NAMESPACE => ["a", "abbr", "acronym", "address", "applet", "area", "article", "aside", "audio", "b", "base", "basefont", "bdi", "bdo", "bgsound", "big", "blink", "blockquote", "body", "br", "button", "canvas", "caption", "center", "cite", "code", "col", "colgroup", "data", "datalist", "dd", "del", "details", "dfn", "dialog", "dir", "div", "dl", "dt", "em", "embed", "fieldset", "figcaption", "figure", "font", "footer", "form", "frame", "frameset", "h1", "h2", "h3", "h4", "h5", "h6", "head", "header", "hgroup", "hr", "html", "i", "iframe", "img", "input", "ins", "isindex", "kbd", "keygen", "label", "legend", "li", "link", "listing", "main", "map", "mark", "marquee", "menu", "menuitem", "meta", "meter", "multicol", "nav", "nextid", "nobr", "noembed", "noframes", "noscript", "object", "ol", "optgroup", "option", "output", "p", "param", "picture", "plaintext", "pre", "progress", "q", "rb", "rp", "rt", "rtc", "ruby", "s", "samp", "script", "search", "section", "select", "slot", "small", "source", "spacer", "span", "strike", "strong", "style", "sub", "summary", "sup", "table", "tbody", "td", "template", "textarea", "tfoot", "th", "thead", "time", "title", "tr", "track", "tt", "u", "ul", "var", "video", "wbr", "xmp"]];
    /** @var array The set of known attributes, used to determine what the `allowUnknownMarkup` setting applies to */
    protected const KNOWN_ATTRIBUTES = [self::NULL_NAMESPACE => ['abbr' => [self::HTML_NAMESPACE => ["td", "th"]], 'accept' => [self::HTML_NAMESPACE => ["form", "input"]], 'accept-charset' => [self::HTML_NAMESPACE => ["form"]], 'accesskey' => [self::HTML_NAMESPACE => ["*"]], 'accumulate' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'action' => [self::HTML_NAMESPACE => ["button", "form"]], 'additive' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'align' => [self::HTML_NAMESPACE => ["caption", "col", "div", "embed", "h1", "h2", "h3", "h4", "h5", "h6", "hr", "iframe", "img", "input", "legend", "object", "p", "table", "tbody", "td", "th", "tr"]], 'alignment-baseline' => [self::SVG_NAMESPACE => ["*"]], 'alink' => [self::HTML_NAMESPACE => ["body"]], 'allow' => [self::HTML_NAMESPACE => ["iframe"]], 'allowfullscreen' => [self::HTML_NAMESPACE => ["iframe"]], 'allowtransparency' => [self::HTML_NAMESPACE => ["iframe"]], 'alt' => [self::HTML_NAMESPACE => ["area", "img", "input"]], 'amplitude' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'archive' => [self::HTML_NAMESPACE => ["object"]], 'aria-activedescendant' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-atomic' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-autocomplete' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-busy' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-checked' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-colcount' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-colindex' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-colspan' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-controls' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-current' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-describedby' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-details' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-disabled' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-dropeffect' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-errormessage' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-expanded' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-flowto' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-grabbed' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-haspopup' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-hidden' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-invalid' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-keyshortcuts' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-label' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-labelledby' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-level' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-live' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-modal' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-multiline' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-multiselectable' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-orientation' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-owns' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-placeholder' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-posinset' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-pressed' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-readonly' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-relevant' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-required' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-roledescription' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-rowcount' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-rowindex' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-rowspan' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-selected' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-setsize' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-sort' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-valuemax' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-valuemin' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-valuenow' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-valuetext' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'as' => [self::HTML_NAMESPACE => ["link"]], 'async' => [self::HTML_NAMESPACE => ["script"]], 'attributeName' => [self::SVG_NAMESPACE => ["animate", "animateTransform", "set"]], 'autocapitalize' => [self::HTML_NAMESPACE => ["*"]], 'autocomplete' => [self::HTML_NAMESPACE => ["button", "fieldset", "form", "input", "object", "output", "select", "textarea"]], 'autofocus' => [self::HTML_NAMESPACE => ["*"]], 'autoplay' => [self::HTML_NAMESPACE => ["audio", "video"]], 'axis' => [self::HTML_NAMESPACE => ["td", "th"]], 'azimuth' => [self::SVG_NAMESPACE => ["feDistantLight"]], 'background' => [self::HTML_NAMESPACE => ["body", "table", "tbody", "td", "tfoot", "th", "thead", "tr"]], 'baseFrequency' => [self::SVG_NAMESPACE => ["feTurbulence"]], 'baseline-shift' => [self::SVG_NAMESPACE => ["*"]], 'begin' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "discard", "set"]], 'behavior' => [self::HTML_NAMESPACE => ["marquee"]], 'bgcolor' => [self::HTML_NAMESPACE => ["body", "table", "td", "th", "tr"]], 'bias' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'blocking' => [self::HTML_NAMESPACE => ["link", "script", "style"]], 'border' => [self::HTML_NAMESPACE => ["img", "input", "object", "table"]], 'bordercolor' => [self::HTML_NAMESPACE => ["table"]], 'bottommargin' => [self::HTML_NAMESPACE => ["body"]], 'by' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'calcMode' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'cellpadding' => [self::HTML_NAMESPACE => ["table"]], 'cellspacing' => [self::HTML_NAMESPACE => ["table"]], 'char' => [self::HTML_NAMESPACE => ["col", "tbody", "td", "th", "tr"]], 'charoff' => [self::HTML_NAMESPACE => ["col", "tbody", "td", "th", "tr"]], 'charset' => [self::HTML_NAMESPACE => ["a", "link", "meta", "script"]], 'checked' => [self::HTML_NAMESPACE => ["input"]], 'cite' => [self::HTML_NAMESPACE => ["blockquote", "del", "ins", "q"]], 'class' => [self::HTML_NAMESPACE => ["*"]], 'classid' => [self::HTML_NAMESPACE => ["object"]], 'clear' => [self::HTML_NAMESPACE => ["br"]], 'clip-path' => [self::SVG_NAMESPACE => ["*"]], 'clip-rule' => [self::SVG_NAMESPACE => ["*"]], 'clipPathUnits' => [self::SVG_NAMESPACE => ["clipPath"]], 'code' => [self::HTML_NAMESPACE => ["object"]], 'codebase' => [self::HTML_NAMESPACE => ["object"]], 'codetype' => [self::HTML_NAMESPACE => ["object"]], 'color' => [self::SVG_NAMESPACE => ["*"], self::HTML_NAMESPACE => ["hr", "link"]], 'color-interpolation' => [self::SVG_NAMESPACE => ["*"]], 'color-interpolation-filters' => [self::SVG_NAMESPACE => ["*"]], 'color-rendering' => [self::SVG_NAMESPACE => ["*"]], 'cols' => [self::HTML_NAMESPACE => ["textarea"]], 'colspan' => [self::HTML_NAMESPACE => ["td", "th"]], 'compact' => [self::HTML_NAMESPACE => ["dl", "menu", "ol", "ul"]], 'content' => [self::HTML_NAMESPACE => ["meta"]], 'contenteditable' => [self::HTML_NAMESPACE => ["*"]], 'contextmenu' => [self::HTML_NAMESPACE => ["*"]], 'controls' => [self::HTML_NAMESPACE => ["audio", "video"]], 'coords' => [self::HTML_NAMESPACE => ["a", "area"]], 'crossorigin' => [self::SVG_NAMESPACE => ["feImage", "image", "script"], self::HTML_NAMESPACE => ["audio", "img", "link", "script", "video"]], 'cursor' => [self::SVG_NAMESPACE => ["*"]], 'cx' => [self::SVG_NAMESPACE => ["circle", "ellipse", "radialGradient"]], 'cy' => [self::SVG_NAMESPACE => ["circle", "ellipse", "radialGradient"]], 'd' => [self::SVG_NAMESPACE => ["path"]], 'data' => [self::HTML_NAMESPACE => ["object"]], 'datafld' => [self::HTML_NAMESPACE => ["a", "button", "div", "fieldset", "frame", "iframe", "img", "input", "label", "legend", "marquee", "object", "select", "span", "textarea"]], 'dataformatas' => [self::HTML_NAMESPACE => ["button", "div", "input", "label", "legend", "marquee", "object", "option", "select", "span", "table"]], 'datapagesize' => [self::HTML_NAMESPACE => ["table"]], 'datasrc' => [self::HTML_NAMESPACE => ["a", "button", "div", "frame", "iframe", "img", "input", "label", "legend", "marquee", "object", "option", "select", "span", "table", "textarea"]], 'datetime' => [self::HTML_NAMESPACE => ["del", "ins", "time"]], 'declare' => [self::HTML_NAMESPACE => ["object"]], 'decoding' => [self::HTML_NAMESPACE => ["img"]], 'default' => [self::HTML_NAMESPACE => ["track"]], 'defer' => [self::HTML_NAMESPACE => ["script"]], 'diffuseConstant' => [self::SVG_NAMESPACE => ["feDiffuseLighting"]], 'dir' => [self::HTML_NAMESPACE => ["*"]], 'direction' => [self::SVG_NAMESPACE => ["*"], self::HTML_NAMESPACE => ["marquee"]], 'dirname' => [self::HTML_NAMESPACE => ["button", "fieldset", "input", "object", "output", "select", "textarea"]], 'disabled' => [self::HTML_NAMESPACE => ["button", "fieldset", "fieldset", "input", "link", "object", "optgroup", "option", "output", "select", "textarea"]], 'display' => [self::SVG_NAMESPACE => ["*"]], 'divisor' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'dominant-baseline' => [self::SVG_NAMESPACE => ["*"]], 'download' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area"]], 'draggable' => [self::HTML_NAMESPACE => ["*"]], 'dropzone' => [self::HTML_NAMESPACE => ["*"]], 'dur' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'dx' => [self::SVG_NAMESPACE => ["feDropShadow", "feOffset", "text", "tspan"]], 'dy' => [self::SVG_NAMESPACE => ["feDropShadow", "feOffset", "text", "tspan"]], 'edgeMode' => [self::SVG_NAMESPACE => ["feGaussianBlur"]], 'elevation' => [self::SVG_NAMESPACE => ["feDistantLight"]], 'enctype' => [self::HTML_NAMESPACE => ["button", "form"]], 'end' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'enterkeyhint' => [self::HTML_NAMESPACE => ["*"]], 'event' => [self::HTML_NAMESPACE => ["script"]], 'exponent' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'fetchpriority' => [self::HTML_NAMESPACE => ["img", "link", "script"]], 'fill' => [self::SVG_NAMESPACE => ["*"]], 'fill-opacity' => [self::SVG_NAMESPACE => ["*"]], 'fill-rule' => [self::SVG_NAMESPACE => ["*"]], 'filter' => [self::SVG_NAMESPACE => ["*"]], 'filterUnits' => [self::SVG_NAMESPACE => ["filter"]], 'flood-color' => [self::SVG_NAMESPACE => ["*"]], 'flood-opacity' => [self::SVG_NAMESPACE => ["*"]], 'font-family' => [self::SVG_NAMESPACE => ["*"]], 'font-size' => [self::SVG_NAMESPACE => ["*"]], 'font-size-adjust' => [self::SVG_NAMESPACE => ["*"]], 'font-stretch' => [self::SVG_NAMESPACE => ["*"]], 'font-style' => [self::SVG_NAMESPACE => ["*"]], 'font-variant' => [self::SVG_NAMESPACE => ["*"]], 'font-weight' => [self::SVG_NAMESPACE => ["*"]], 'for' => [self::HTML_NAMESPACE => ["label", "output", "script"]], 'form' => [self::HTML_NAMESPACE => ["button", "fieldset", "input", "object", "output", "select", "textarea"]], 'formaction' => [self::HTML_NAMESPACE => ["button", "form"]], 'formenctype' => [self::HTML_NAMESPACE => ["button", "form"]], 'formmethod' => [self::HTML_NAMESPACE => ["button", "form"]], 'formnovalidate' => [self::HTML_NAMESPACE => ["button", "form"]], 'formtarget' => [self::HTML_NAMESPACE => ["button", "form"]], 'fr' => [self::SVG_NAMESPACE => ["radialGradient"]], 'frame' => [self::HTML_NAMESPACE => ["table"]], 'frameborder' => [self::HTML_NAMESPACE => ["iframe"]], 'framespacing' => [self::HTML_NAMESPACE => ["iframe"]], 'from' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'fx' => [self::SVG_NAMESPACE => ["radialGradient"]], 'fy' => [self::SVG_NAMESPACE => ["radialGradient"]], 'glyph-orientation-horizontal' => [self::SVG_NAMESPACE => ["*"]], 'glyph-orientation-vertical' => [self::SVG_NAMESPACE => ["*"]], 'gradientTransform' => [self::SVG_NAMESPACE => ["linearGradient", "radialGradient"]], 'gradientUnits' => [self::SVG_NAMESPACE => ["linearGradient", "radialGradient"]], 'headers' => [self::HTML_NAMESPACE => ["td", "th"]], 'height' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "feSpecularLighting", "feTile", "feTurbulence", "filter", "foreignObject", "image", "mask", "pattern", "rect", "svg", "symbol", "use"], self::HTML_NAMESPACE => ["canvas", "embed", "iframe", "img", "object", "source", "table", "tbody", "td", "th", "tr", "video"]], 'hidden' => [self::HTML_NAMESPACE => ["*"]], 'high' => [self::HTML_NAMESPACE => ["meter"]], 'href' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "discard", "feImage", "image", "linearGradient", "mpath", "pattern", "radialGradient", "script", "set", "textPath", "use"], self::HTML_NAMESPACE => ["a", "area", "base", "link"]], 'hreflang' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area", "area", "link"]], 'hspace' => [self::HTML_NAMESPACE => ["embed", "iframe", "img", "input", "object"]], 'http-equiv' => [self::HTML_NAMESPACE => ["meta"]], 'id' => [self::HTML_NAMESPACE => ["*"]], 'image-rendering' => [self::SVG_NAMESPACE => ["*"]], 'imagesizes' => [self::HTML_NAMESPACE => ["link"]], 'imagesrcset' => [self::HTML_NAMESPACE => ["link"]], 'in' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feGaussianBlur", "feMergeNode", "feMorphology", "feOffset", "feSpecularLighting", "feTile"]], 'in2' => [self::SVG_NAMESPACE => ["feBlend", "feComposite", "feDisplacementMap"]], 'inputmode' => [self::HTML_NAMESPACE => ["*"]], 'integrity' => [self::HTML_NAMESPACE => ["link", "script"]], 'intercept' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'is' => [self::HTML_NAMESPACE => ["*"]], 'ismap' => [self::HTML_NAMESPACE => ["img", "input"]], 'itemid' => [self::HTML_NAMESPACE => ["*"]], 'itemprop' => [self::HTML_NAMESPACE => ["*"]], 'itemref' => [self::HTML_NAMESPACE => ["*"]], 'itemscope' => [self::HTML_NAMESPACE => ["*"]], 'itemtype' => [self::HTML_NAMESPACE => ["*"]], 'k1' => [self::SVG_NAMESPACE => ["feComposite"]], 'k2' => [self::SVG_NAMESPACE => ["feComposite"]], 'k3' => [self::SVG_NAMESPACE => ["feComposite"]], 'k4' => [self::SVG_NAMESPACE => ["feComposite"]], 'kernelMatrix' => [self::SVG_NAMESPACE => ["feConvolveMatrix", "feConvolveMatrix", "feDiffuseLighting", "feSpecularLighting"]], 'keyPoints' => [self::SVG_NAMESPACE => ["animateMotion"]], 'keySplines' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'keyTimes' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'kind' => [self::HTML_NAMESPACE => ["track"]], 'label' => [self::HTML_NAMESPACE => ["menu", "optgroup", "option", "track"]], 'lang' => [self::HTML_NAMESPACE => ["*"]], 'language' => [self::HTML_NAMESPACE => ["script"]], 'leftmargin' => [self::HTML_NAMESPACE => ["body"]], 'lengthAdjust' => [self::SVG_NAMESPACE => ["text", "textPath", "tspan"]], 'letter-spacing' => [self::SVG_NAMESPACE => ["*"]], 'lighting-color' => [self::SVG_NAMESPACE => ["*"]], 'limitingConeAngle' => [self::SVG_NAMESPACE => ["feSpotLight"]], 'link' => [self::HTML_NAMESPACE => ["body"]], 'list' => [self::HTML_NAMESPACE => ["input"]], 'loading' => [self::HTML_NAMESPACE => ["iframe", "img"]], 'longdesc' => [self::HTML_NAMESPACE => ["iframe", "img"]], 'loop' => [self::HTML_NAMESPACE => ["audio", "marquee", "video"]], 'low' => [self::HTML_NAMESPACE => ["meter"]], 'lowsrc' => [self::HTML_NAMESPACE => ["img"]], 'manifest' => [self::HTML_NAMESPACE => ["html"]], 'marginheight' => [self::HTML_NAMESPACE => ["body", "iframe"]], 'marginwidth' => [self::HTML_NAMESPACE => ["body", "iframe"]], 'marker-end' => [self::SVG_NAMESPACE => ["*"]], 'marker-mid' => [self::SVG_NAMESPACE => ["*"]], 'marker-start' => [self::SVG_NAMESPACE => ["*"]], 'markerHeight' => [self::SVG_NAMESPACE => ["marker"]], 'markerUnits' => [self::SVG_NAMESPACE => ["marker"]], 'markerWidth' => [self::SVG_NAMESPACE => ["marker"]], 'mask' => [self::SVG_NAMESPACE => ["*"]], 'maskContentUnits' => [self::SVG_NAMESPACE => ["mask"]], 'maskUnits' => [self::SVG_NAMESPACE => ["mask"]], 'max' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"], self::HTML_NAMESPACE => ["input", "meter", "progress"]], 'maxlength' => [self::HTML_NAMESPACE => ["input", "textarea"]], 'media' => [self::SVG_NAMESPACE => ["style"], self::HTML_NAMESPACE => ["link", "meta", "source", "style"]], 'method' => [self::SVG_NAMESPACE => ["textPath"], self::HTML_NAMESPACE => ["button", "form"]], 'methods' => [self::HTML_NAMESPACE => ["a", "link"]], 'min' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"], self::HTML_NAMESPACE => ["input", "meter"]], 'minlength' => [self::HTML_NAMESPACE => ["input", "textarea"]], 'mode' => [self::SVG_NAMESPACE => ["feBlend"]], 'multiple' => [self::HTML_NAMESPACE => ["input", "select"]], 'muted' => [self::HTML_NAMESPACE => ["audio", "video"]], 'name' => [self::HTML_NAMESPACE => ["a", "button", "embed", "fieldset", "form", "iframe", "img", "input", "map", "meta", "object", "option", "output", "select", "slot", "textarea"]], 'nohref' => [self::HTML_NAMESPACE => ["area"]], 'nomodule' => [self::HTML_NAMESPACE => ["script"]], 'nonce' => [self::HTML_NAMESPACE => ["*"]], 'noshade' => [self::HTML_NAMESPACE => ["hr"]], 'novalidate' => [self::HTML_NAMESPACE => ["button", "form"]], 'nowrap' => [self::HTML_NAMESPACE => ["td", "th"]], 'numOctaves' => [self::SVG_NAMESPACE => ["feTurbulence"]], 'offset' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR", "stop"]], 'onabort' => [self::SVG_NAMESPACE => ["svg"]], 'onafterprint' => [self::SVG_NAMESPACE => ["*"]], 'onbeforeprint' => [self::SVG_NAMESPACE => ["*"]], 'onbegin' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'oncancel' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncanplay' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncanplaythrough' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onchange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onclick' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onclose' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncopy' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncuechange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncut' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", 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"symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragend' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragenter' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragexit' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragleave' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragover' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragstart' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondrop' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondurationchange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onemptied' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onend' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'onended' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onerror' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onfocus' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onfocusin' => [self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "defs", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video"]], 'onfocusout' => [self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "defs", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video"]], 'onhashchange' => [self::SVG_NAMESPACE => ["*"]], 'oninput' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oninvalid' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onkeydown' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onkeypress' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onkeyup' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onload' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onloadeddata' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onloadedmetadata' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onloadstart' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmessage' => [self::SVG_NAMESPACE => ["*"]], 'onmousedown' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseenter' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseleave' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmousemove' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseout' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseover' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseup' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmousewheel' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onoffline' => [self::SVG_NAMESPACE => ["*"]], 'ononline' => [self::SVG_NAMESPACE => ["*"]], 'onpagehide' => [self::SVG_NAMESPACE => ["*"]], 'onpageshow' => [self::SVG_NAMESPACE => ["*"]], 'onpaste' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onpause' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onplay' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onplaying' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onpopstate' => [self::SVG_NAMESPACE => ["*"]], 'onprogress' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onratechange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onrepeat' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'onreset' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onresize' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onscroll' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onseeked' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onseeking' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onselect' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onshow' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"], self::HTML_NAMESPACE => ["*"]], 'onstalled' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onstorage' => [self::SVG_NAMESPACE => ["*"]], 'onsubmit' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onsuspend' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ontimeupdate' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ontoggle' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onunload' => [self::SVG_NAMESPACE => ["*"]], 'onvolumechange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onwaiting' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'opacity' => [self::SVG_NAMESPACE => ["*"]], 'open' => [self::HTML_NAMESPACE => ["details", "dialog"]], 'operator' => [self::SVG_NAMESPACE => ["feComposite", "feMorphology"]], 'optimum' => [self::HTML_NAMESPACE => ["meter"]], 'order' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'orient' => [self::SVG_NAMESPACE => ["marker"]], 'origin' => [self::SVG_NAMESPACE => ["animateMotion"]], 'overflow' => [self::SVG_NAMESPACE => ["*"]], 'paint-order' => [self::SVG_NAMESPACE => ["*"]], 'path' => [self::SVG_NAMESPACE => ["animateMotion", "textPath"]], 'pathLength' => [self::SVG_NAMESPACE => ["circle", "ellipse", "line", "path", "polygon", "polyline", "rect"]], 'pattern' => [self::HTML_NAMESPACE => ["input"]], 'patternContentUnits' => [self::SVG_NAMESPACE => ["pattern"]], 'patternTransform' => [self::SVG_NAMESPACE => ["pattern"]], 'patternUnits' => [self::SVG_NAMESPACE => ["pattern"]], 'ping' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area"]], 'placeholder' => [self::HTML_NAMESPACE => ["input", "textarea"]], 'playbackorder' => [self::SVG_NAMESPACE => ["svg"]], 'playsinline' => [self::HTML_NAMESPACE => ["video"]], 'pointer-events' => [self::SVG_NAMESPACE => ["*"]], 'points' => [self::SVG_NAMESPACE => ["polygon", "polyline"]], 'pointsAtX' => [self::SVG_NAMESPACE => ["feSpotLight"]], 'pointsAtY' => [self::SVG_NAMESPACE => ["feSpotLight"]], 'pointsAtZ' => [self::SVG_NAMESPACE => ["feSpotLight"]], 'popover' => [self::HTML_NAMESPACE => ["*"]], 'popovertarget' => [self::HTML_NAMESPACE => ["*"]], 'popovertargetaction' => [self::HTML_NAMESPACE => ["*"]], 'poster' => [self::HTML_NAMESPACE => ["video"]], 'preload' => [self::HTML_NAMESPACE => ["audio", "video"]], 'preserveAlpha' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'preserveAspectRatio' => [self::SVG_NAMESPACE => ["canvas", "feImage", "image", "marker", "pattern", "svg", "symbol", "view"]], 'primitiveUnits' => [self::SVG_NAMESPACE => ["filter"]], 'profile' => [self::HTML_NAMESPACE => ["head"]], 'r' => [self::SVG_NAMESPACE => ["circle", "radialGradient"]], 'radius' => [self::SVG_NAMESPACE => ["feMorphology"]], 'readonly' => [self::HTML_NAMESPACE => ["form-associated custom elements", "input", "textarea"]], 'refX' => [self::SVG_NAMESPACE => ["marker", "symbol"]], 'refY' => [self::SVG_NAMESPACE => ["marker", "symbol"]], 'referrerpolicy' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area", "iframe", "img", "link", "script"]], 'rel' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area", "form", "link"]], 'repeatCount' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'repeatDur' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'required' => [self::HTML_NAMESPACE => ["input", "select", "textarea"]], 'requiredExtensions' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "mask", "path", "polygon", "polyline", "rect", "set", "svg", "switch", "text", "textPath", "tspan", "unknown", "use", "video"]], 'restart' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'result' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "feSpecularLighting", "feTile", "feTurbulence"]], 'rev' => [self::HTML_NAMESPACE => ["a", "link"]], 'reversed' => [self::HTML_NAMESPACE => ["ol"]], 'rightmargin' => [self::HTML_NAMESPACE => ["body"]], 'role' => [self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"], self::HTML_NAMESPACE => ["*"]], 'rotate' => [self::SVG_NAMESPACE => ["animateMotion", "text", "tspan"]], 'rows' => [self::HTML_NAMESPACE => ["textarea"]], 'rowspan' => [self::HTML_NAMESPACE => ["td", "th"]], 'rules' => [self::HTML_NAMESPACE => ["table"]], 'rx' => [self::SVG_NAMESPACE => ["ellipse", "rect"]], 'ry' => [self::SVG_NAMESPACE => ["ellipse", "rect"]], 'sandbox' => [self::HTML_NAMESPACE => ["iframe"]], 'scale' => [self::SVG_NAMESPACE => ["feDisplacementMap"]], 'scheme' => [self::HTML_NAMESPACE => ["meta"]], 'scope' => [self::HTML_NAMESPACE => ["td", "th"]], 'scrolling' => [self::HTML_NAMESPACE => ["iframe"]], 'seed' => [self::SVG_NAMESPACE => ["feTurbulence"]], 'selected' => [self::HTML_NAMESPACE => ["option"]], 'shape' => [self::HTML_NAMESPACE => ["a", "area"]], 'shape-rendering' => [self::SVG_NAMESPACE => ["*"]], 'side' => [self::SVG_NAMESPACE => ["textPath"]], 'size' => [self::HTML_NAMESPACE => ["hr", "input", "select"]], 'sizes' => [self::HTML_NAMESPACE => ["img", "link", "source"]], 'slope' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'slot' => [self::HTML_NAMESPACE => ["*"]], 'spacing' => [self::SVG_NAMESPACE => ["textPath"]], 'span' => [self::HTML_NAMESPACE => ["col", "colgroup"]], 'specularConstant' => [self::SVG_NAMESPACE => ["feSpecularLighting"]], 'specularExponent' => [self::SVG_NAMESPACE => ["feSpecularLighting", "feSpotLight"]], 'spellcheck' => [self::HTML_NAMESPACE => ["*"]], 'spreadMethod' => [self::SVG_NAMESPACE => ["linearGradient", "radialGradient"]], 'src' => [self::HTML_NAMESPACE => ["audio", "embed", "iframe", "img", "input", "script", "source", "track", "video"]], 'srcdoc' => [self::HTML_NAMESPACE => ["iframe"]], 'srclang' => [self::HTML_NAMESPACE => ["track"]], 'srcset' => [self::HTML_NAMESPACE => ["img", "source"]], 'standby' => [self::HTML_NAMESPACE => ["object"]], 'start' => [self::HTML_NAMESPACE => ["ol"]], 'startOffset' => [self::SVG_NAMESPACE => ["textPath"]], 'stdDeviation' => [self::SVG_NAMESPACE => ["feDropShadow", "feGaussianBlur"]], 'step' => [self::HTML_NAMESPACE => ["input"]], 'stitchTiles' => [self::SVG_NAMESPACE => ["feTurbulence"]], 'stop-color' => [self::SVG_NAMESPACE => ["*"]], 'stop-opacity' => [self::SVG_NAMESPACE => ["*"]], 'stroke' => [self::SVG_NAMESPACE => ["*"]], 'stroke-dasharray' => [self::SVG_NAMESPACE => ["*"]], 'stroke-dashoffset' => [self::SVG_NAMESPACE => ["*"]], 'stroke-linecap' => [self::SVG_NAMESPACE => ["*"]], 'stroke-linejoin' => [self::SVG_NAMESPACE => ["*"]], 'stroke-miterlimit' => [self::SVG_NAMESPACE => ["*"]], 'stroke-opacity' => [self::SVG_NAMESPACE => ["*"]], 'stroke-width' => [self::SVG_NAMESPACE => ["*"]], 'style' => [self::HTML_NAMESPACE => ["*"]], 'summary' => [self::HTML_NAMESPACE => ["table"]], 'surfaceScale' => [self::SVG_NAMESPACE => ["feDiffuseLighting", "feSpecularLighting"]], 'systemLanguage' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "mask", "path", "polygon", "polyline", "rect", "set", "svg", "switch", "text", "textPath", "tspan", "unknown", "use", "video"]], 'tabindex' => [self::HTML_NAMESPACE => ["*"]], 'tableValues' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'target' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area", "base", "button", "form", "link"]], 'targetX' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'targetY' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'text' => [self::HTML_NAMESPACE => ["body"]], 'text-anchor' => [self::SVG_NAMESPACE => ["*"]], 'text-decoration' => [self::SVG_NAMESPACE => ["*"]], 'text-overflow' => [self::SVG_NAMESPACE => ["*"]], 'text-rendering' => [self::SVG_NAMESPACE => ["*"]], 'textLength' => [self::SVG_NAMESPACE => ["text", "textPath", "tspan"]], 'timelinebegin' => [self::SVG_NAMESPACE => ["svg"]], 'title' => [self::HTML_NAMESPACE => ["*"]], 'to' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'topmargin' => [self::HTML_NAMESPACE => ["body"]], 'transform' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "defs", "desc", "discard", "ellipse", "feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDistantLight", "feDropShadow", "feFlood", "feFuncA", "feFuncB", "feFuncG", "feFuncR", "feGaussianBlur", "feImage", "feMerge", "feMergeNode", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "g", "iframe", "image", "line", "marker", "mask", "metadata", "mpath", "path", "polygon", "polyline", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'translate' => [self::HTML_NAMESPACE => ["*"]], 'truespeed' => [self::HTML_NAMESPACE => ["marquee"]], 'type' => [self::SVG_NAMESPACE => ["a", "animateTransform", "feColorMatrix", "feFuncA", "feFuncB", "feFuncG", "feFuncR", "feTurbulence", "script", "style"], self::HTML_NAMESPACE => ["a", "area", "area", "button", "embed", "input", "li", "link", "menu", "object", "ol", "script", "source", "style", "ul"]], 'typemustmatch' => [self::HTML_NAMESPACE => ["object"]], 'unicode-bidi' => [self::SVG_NAMESPACE => ["*"]], 'urn' => [self::HTML_NAMESPACE => ["a", "link"]], 'usemap' => [self::HTML_NAMESPACE => ["img", "input", "object"]], 'valign' => [self::HTML_NAMESPACE => ["col", "tbody", "td", "th", "tr"]], 'value' => [self::HTML_NAMESPACE => ["button", "data", "input", "li", "meter", "option", "progress"]], 'values' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "feColorMatrix"]], 'vector-effect' => [self::SVG_NAMESPACE => ["*"]], 'version' => [self::HTML_NAMESPACE => ["html"]], 'viewBox' => [self::SVG_NAMESPACE => ["marker", "pattern", "svg", "symbol", "view"]], 'visibility' => [self::SVG_NAMESPACE => ["*"]], 'vlink' => [self::HTML_NAMESPACE => ["body"]], 'vspace' => [self::HTML_NAMESPACE => ["embed", "iframe", "img", "input", "object"]], 'white-space' => [self::SVG_NAMESPACE => ["*"]], 'width' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "feSpecularLighting", "feTile", "feTurbulence", "filter", "foreignObject", "image", "mask", "pattern", "rect", "svg", "symbol", "use"], self::HTML_NAMESPACE => ["canvas", "col", "embed", "hr", "iframe", "img", "object", "pre", "source", "table", "td", "th", "video"]], 'word-spacing' => [self::SVG_NAMESPACE => ["*"]], 'wrap' => [self::HTML_NAMESPACE => ["textarea"]], 'writing-mode' => [self::SVG_NAMESPACE => ["*"]], 'x' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "image", "mask", "pattern", "rect", "svg", "symbol", "text", "tspan", "use"]], 'x1' => [self::SVG_NAMESPACE => ["line", "linearGradient"]], 'x2' => [self::SVG_NAMESPACE => ["line", "linearGradient"]], 'xChannelSelector' => [self::SVG_NAMESPACE => ["feDisplacementMap"]], 'y' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "image", "mask", "pattern", "rect", "svg", "symbol", "text", "tspan", "use"]], 'y1' => [self::SVG_NAMESPACE => ["line", "linearGradient"]], 'y2' => [self::SVG_NAMESPACE => ["line", "linearGradient"]], 'yChannelSelector' => [self::SVG_NAMESPACE => ["feDisplacementMap"]], 'z' => [self::SVG_NAMESPACE => ["fePointLight", "feSpotLight"]], 'zoomAndPan' => [self::SVG_NAMESPACE => ["svg", "view"]]], self::XLINK_NAMESPACE => ['href' => [self::SVG_NAMESPACE => ["a", "image", "linearGradient", "pattern", "radialGradient", "script", "textPath", "use", "feImage"]], 'title' => [self::SVG_NAMESPACE => ["a", "image", "linearGradient", "pattern", "radialGradient", "script", "textPath", "use"]]], self::XML_NAMESPACE => ['space' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "defs", "desc", "discard", "ellipse", "feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDistantLight", "feDropShadow", "feFlood", "feFuncA", "feFuncB", "feFuncG", "feFuncR", "feGaussianBlur", "feImage", "feMerge", "feMergeNode", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "mask", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]]]];
    /** @var array The baseline list of allowed attributes */
    protected const BASELINE_ATTR = [
        self::HTML_NAMESPACE => [
            'abbr'                     => true,
            'accept'                   => true,
            'accept-charset'           => true,
            'accesskey'                => true,
            'action'                   => true,
            'align'                    => true,
            'alink'                    => true,
            'allow'                    => true,
            'allowfullscreen'          => true,
            'allowpaymentrequest'      => true,
            'alt'                      => true,
            'anchor'                   => true,
            'archive'                  => true,
            'as'                       => true,
            'async'                    => true,
            'autocapitalize'           => true,
            'autocomplete'             => true,
            'autocorrect'              => true,
            'autofocus'                => true,
            'autopictureinpicture'     => true,
            'autoplay'                 => true,
            'axis'                     => true,
            'background'               => true,
            'behavior'                 => true,
            'bgcolor'                  => true,
            'border'                   => true,
            'bordercolor'              => true,
            'capture'                  => true,
            'cellpadding'              => true,
            'cellspacing'              => true,
            'challenge'                => true,
            'char'                     => true,
            'charoff'                  => true,
            'charset'                  => true,
            'checked'                  => true,
            'cite'                     => true,
            'class'                    => true,
            'classid'                  => true,
            'clear'                    => true,
            'code'                     => true,
            'codebase'                 => true,
            'codetype'                 => true,
            'color'                    => true,
            'cols'                     => true,
            'colspan'                  => true,
            'compact'                  => true,
            'content'                  => true,
            'contenteditable'          => true,
            'controls'                 => true,
            'controlslist'             => true,
            'conversiondestination'    => true,
            'coords'                   => true,
            'crossorigin'              => true,
            'csp'                      => true,
            'data'                     => true,
            'datetime'                 => true,
            'declare'                  => true,
            'decoding'                 => true,
            'default'                  => true,
            'defer'                    => true,
            'dir'                      => true,
            'direction'                => true,
            'dirname'                  => true,
            'disabled'                 => true,
            'disablepictureinpicture'  => true,
            'disableremoteplayback'    => true,
            'disallowdocumentaccess'   => true,
            'download'                 => true,
            'draggable'                => true,
            'elementtiming'            => true,
            'enctype'                  => true,
            'end'                      => true,
            'enterkeyhint'             => true,
            'event'                    => true,
            'exportparts'              => true,
            'face'                     => true,
            'for'                      => true,
            'form'                     => true,
            'formaction'               => true,
            'formenctype'              => true,
            'formmethod'               => true,
            'formnovalidate'           => true,
            'formtarget'               => true,
            'frame'                    => true,
            'frameborder'              => true,
            'headers'                  => true,
            'height'                   => true,
            'hidden'                   => true,
            'high'                     => true,
            'href'                     => true,
            'hreflang'                 => true,
            'hreftranslate'            => true,
            'hspace'                   => true,
            'http-equiv'               => true,
            'id'                       => true,
            'imagesizes'               => true,
            'imagesrcset'              => true,
            'importance'               => true,
            'impressiondata'           => true,
            'impressionexpiry'         => true,
            'incremental'              => true,
            'inert'                    => true,
            'inputmode'                => true,
            'integrity'                => true,
            'invisible'                => true,
            'is'                       => true,
            'ismap'                    => true,
            'keytype'                  => true,
            'kind'                     => true,
            'label'                    => true,
            'lang'                     => true,
            'language'                 => true,
            'latencyhint'              => true,
            'leftmargin'               => true,
            'link'                     => true,
            'list'                     => true,
            'loading'                  => true,
            'longdesc'                 => true,
            'loop'                     => true,
            'low'                      => true,
            'lowsrc'                   => true,
            'manifest'                 => true,
            'marginheight'             => true,
            'marginwidth'              => true,
            'max'                      => true,
            'maxlength'                => true,
            'mayscript'                => true,
            'media'                    => true,
            'method'                   => true,
            'min'                      => true,
            'minlength'                => true,
            'multiple'                 => true,
            'muted'                    => true,
            'name'                     => true,
            'nohref'                   => true,
            'nomodule'                 => true,
            'nonce'                    => true,
            'noresize'                 => true,
            'noshade'                  => true,
            'novalidate'               => true,
            'nowrap'                   => true,
            'object'                   => true,
            'open'                     => true,
            'optimum'                  => true,
            'part'                     => true,
            'pattern'                  => true,
            'ping'                     => true,
            'placeholder'              => true,
            'playsinline'              => true,
            'policy'                   => true,
            'poster'                   => true,
            'preload'                  => true,
            'pseudo'                   => true,
            'readonly'                 => true,
            'referrerpolicy'           => true,
            'rel'                      => true,
            'reportingorigin'          => true,
            'required'                 => true,
            'resources'                => true,
            'rev'                      => true,
            'reversed'                 => true,
            'role'                     => true,
            'rows'                     => true,
            'rowspan'                  => true,
            'rules'                    => true,
            'sandbox'                  => true,
            'scheme'                   => true,
            'scope'                    => true,
            'scopes'                   => true,
            'scrollamount'             => true,
            'scrolldelay'              => true,
            'scrolling'                => true,
            'select'                   => true,
            'selected'                 => true,
            'shadowroot'               => true,
            'shadowrootdelegatesfocus' => true,
            'shape'                    => true,
            'size'                     => true,
            'sizes'                    => true,
            'slot'                     => true,
            'span'                     => true,
            'spellcheck'               => true,
            'src'                      => true,
            'srcdoc'                   => true,
            'srclang'                  => true,
            'srcset'                   => true,
            'standby'                  => true,
            'start'                    => true,
            'step'                     => true,
            'style'                    => true,
            'summary'                  => true,
            'tabindex'                 => true,
            'target'                   => true,
            'text'                     => true,
            'title'                    => true,
            'topmargin'                => true,
            'translate'                => true,
            'truespeed'                => true,
            'trusttoken'               => true,
            'type'                     => true,
            'usemap'                   => true,
            'valign'                   => true,
            'value'                    => true,
            'valuetype'                => true,
            'version'                  => true,
            'virtualkeyboardpolicy'    => true,
            'vlink'                    => true,
            'vspace'                   => true,
            'webkitdirectory'          => true,
            'width'                    => true,
            'wrap'                     => true,
        ],
    ];
    /** @var array The default configuration structure */
    protected const DEFAULT_CONF = [
        'allowElements' => [
            self::HTML_NAMESPACE => [
                'a' => true,
                'abbr' => true,
                'acronym' => true,
                'address' => true,
                'area' => true,
                'article' => true,
                'aside' => true,
                'audio' => true,
                'b' => true,
                'bdi' => true,
                'bdo' => true,
                'bgsound' => true,
                'big' => true,
                'blockquote' => true,
                'body' => true,
                'br' => true,
                'button' => true,
                'canvas' => true,
                'caption' => true,
                'center' => true,
                'cite' => true,
                'code' => true,
                'col' => true,
                'colgroup' => true,
                'datalist' => true,
                'dd' => true,
                'del' => true,
                'details' => true,
                'dfn' => true,
                'dialog' => true,
                'dir' => true,
                'div' => true,
                'dl' => true,
                'dt' => true,
                'em' => true,
                'fieldset' => true,
                'figcaption' => true,
                'figure' => true,
                'font' => true,
                'footer' => true,
                'form' => true,
                'h1' => true,
                'h2' => true,
                'h3' => true,
                'h4' => true,
                'h5' => true,
                'h6' => true,
                'head' => true,
                'header' => true,
                'hgroup' => true,
                'hr' => true,
                'html' => true,
                'i' => true,
                'img' => true,
                'input' => true,
                'ins' => true,
                'kbd' => true,
                'keygen' => true,
                'label' => true,
                'layer' => true,
                'legend' => true,
                'li' => true,
                'link' => true,
                'listing' => true,
                'main' => true,
                'map' => true,
                'mark' => true,
                'marquee' => true,
                'menu' => true,
                'meta' => true,
                'meter' => true,
                'nav' => true,
                'nobr' => true,
                'ol' => true,
                'optgroup' => true,
                'option' => true,
                'output' => true,
                'p' => true,
                'picture' => true,
                'popup' => true,
                'pre' => true,
                'progress' => true,
                'q' => true,
                'rb' => true,
                'rp' => true,
                'rt' => true,
                'rtc' => true,
                'ruby' => true,
                's' => true,
                'samp' => true,
                'search' => true,
                'section' => true,
                'select' => true,
                'selectmenu' => true,
                'small' => true,
                'source' => true,
                'span' => true,
                'strike' => true,
                'strong' => true,
                'style' => true,
                'sub' => true,
                'summary' => true,
                'sup' => true,
                'table' => true,
                'tbody' => true,
                'td' => true,
                'tfoot' => true,
                'th' => true,
                'thead' => true,
                'time' => true,
                'tr' => true,
                'track' => true,
                'tt' => true,
                'u' => true,
                'ul' => true,
                'var' => true,
                'video' => true,
                'wbr' => true,
            ]
        ],
        'allowAttributes' => [
            self::NULL_NAMESPACE => [
                'abbr' => "*",
                'accept' => "*",
                'accept-charset' => "*",
                'accesskey' => "*",
                'action' => "*",
                'align' => "*",
                'alink' => "*",
                'allow' => "*",
                'allowfullscreen' => "*",
                'alt' => "*",
                'anchor' => "*",
                'archive' => "*",
                'as' => "*",
                'async' => "*",
                'autocapitalize' => "*",
                'autocomplete' => "*",
                'autocorrect' => "*",
                'autofocus' => "*",
                'autopictureinpicture' => "*",
                'autoplay' => "*",
                'axis' => "*",
                'background' => "*",
                'behavior' => "*",
                'bgcolor' => "*",
                'border' => "*",
                'bordercolor' => "*",
                'capture' => "*",
                'cellpadding' => "*",
                'cellspacing' => "*",
                'challenge' => "*",
                'char' => "*",
                'charoff' => "*",
                'charset' => "*",
                'checked' => "*",
                'cite' => "*",
                'class' => "*",
                'classid' => "*",
                'clear' => "*",
                'code' => "*",
                'codebase' => "*",
                'codetype' => "*",
                'color' => "*",
                'cols' => "*",
                'colspan' => "*",
                'compact' => "*",
                'content' => "*",
                'contenteditable' => "*",
                'controls' => "*",
                'controlslist' => "*",
                'conversiondestination' => "*",
                'coords' => "*",
                'crossorigin' => "*",
                'csp' => "*",
                'data' => "*",
                'datetime' => "*",
                'declare' => "*",
                'decoding' => "*",
                'default' => "*",
                'defer' => "*",
                'dir' => "*",
                'direction' => "*",
                'dirname' => "*",
                'disabled' => "*",
                'disablepictureinpicture' => "*",
                'disableremoteplayback' => "*",
                'disallowdocumentaccess' => "*",
                'download' => "*",
                'draggable' => "*",
                'elementtiming' => "*",
                'enctype' => "*",
                'end' => "*",
                'enterkeyhint' => "*",
                'event' => "*",
                'exportparts' => "*",
                'face' => "*",
                'for' => "*",
                'form' => "*",
                'formaction' => "*",
                'formenctype' => "*",
                'formmethod' => "*",
                'formnovalidate' => "*",
                'formtarget' => "*",
                'frame' => "*",
                'frameborder' => "*",
                'headers' => "*",
                'height' => "*",
                'hidden' => "*",
                'high' => "*",
                'href' => "*",
                'hreflang' => "*",
                'hreftranslate' => "*",
                'hspace' => "*",
                'http-equiv' => "*",
                'id' => "*",
                'imagesizes' => "*",
                'imagesrcset' => "*",
                'importance' => "*",
                'impressiondata' => "*",
                'impressionexpiry' => "*",
                'incremental' => "*",
                'inert' => "*",
                'inputmode' => "*",
                'integrity' => "*",
                'invisible' => "*",
                'is' => "*",
                'ismap' => "*",
                'keytype' => "*",
                'kind' => "*",
                'label' => "*",
                'lang' => "*",
                'language' => "*",
                'latencyhint' => "*",
                'leftmargin' => "*",
                'link' => "*",
                'list' => "*",
                'loading' => "*",
                'longdesc' => "*",
                'loop' => "*",
                'low' => "*",
                'lowsrc' => "*",
                'manifest' => "*",
                'marginheight' => "*",
                'marginwidth' => "*",
                'max' => "*",
                'maxlength' => "*",
                'mayscript' => "*",
                'media' => "*",
                'method' => "*",
                'min' => "*",
                'minlength' => "*",
                'multiple' => "*",
                'muted' => "*",
                'name' => "*",
                'nohref' => "*",
                'nomodule' => "*",
                'nonce' => "*",
                'noresize' => "*",
                'noshade' => "*",
                'novalidate' => "*",
                'nowrap' => "*",
                'object' => "*",
                'open' => "*",
                'optimum' => "*",
                'part' => "*",
                'pattern' => "*",
                'ping' => "*",
                'placeholder' => "*",
                'playsinline' => "*",
                'policy' => "*",
                'poster' => "*",
                'preload' => "*",
                'pseudo' => "*",
                'readonly' => "*",
                'referrerpolicy' => "*",
                'rel' => "*",
                'reportingorigin' => "*",
                'required' => "*",
                'resources' => "*",
                'rev' => "*",
                'reversed' => "*",
                'role' => "*",
                'rows' => "*",
                'rowspan' => "*",
                'rules' => "*",
                'sandbox' => "*",
                'scheme' => "*",
                'scope' => "*",
                'scopes' => "*",
                'scrollamount' => "*",
                'scrolldelay' => "*",
                'scrolling' => "*",
                'select' => "*",
                'selected' => "*",
                'shadowroot' => "*",
                'shadowrootdelegatesfocus' => "*",
                'shape' => "*",
                'size' => "*",
                'sizes' => "*",
                'slot' => "*",
                'span' => "*",
                'spellcheck' => "*",
                'src' => "*",
                'srcdoc' => "*",
                'srclang' => "*",
                'srcset' => "*",
                'standby' => "*",
                'start' => "*",
                'step' => "*",
                'style' => "*",
                'summary' => "*",
                'tabindex' => "*",
                'target' => "*",
                'text' => "*",
                'title' => "*",
                'topmargin' => "*",
                'translate' => "*",
                'truespeed' => "*",
                'trusttoken' => "*",
                'type' => "*",
                'usemap' => "*",
                'valign' => "*",
                'value' => "*",
                'valuetype' => "*",
                'version' => "*",
                'virtualkeyboardpolicy' => "*",
                'vlink' => "*",
                'vspace' => "*",
                'webkitdirectory' => "*",
                'width' => "*",
                'wrap' => "*",
            ],
        ],
        'allowCustomElements' => false,
        'allowUnknownMarkup' => false,
        'allowComments' => false,
        'allowProcessingInstructions' => false,
        'nullNamespaceAsHtml' => true,
    ];

    /** @var array The parsed configuration, as used for processing */
    protected $config;

    /** Initializes a sanitizer with the provided configuration, or the default configuration if no configuration is provided
     * 
     * The configuration array may contain any of the following keys:
     * 
     * - `allowElements`: an indexed array of elements to retain in the tree. Elements not in this list will be treated as if they were included in the `blockElements` list
     * - `blockElements`: an indexed array of elements to remove from the tree while retaining their children
     * - `dropElements`: an indexed array of elements to remove from the tree along with their children
     * - `allowAttributes`: an indexed array of attributes to allow on certain elements. Attributes not in this list will be dropped
     * - `dropAttributes`: an indexed array of attributes to remove from certain elements
     * - `allowCustomElements`: Whether to allow custom elements, false by default. For the purposes of this implementation these are HTML elements with names containing dashed. If true, elements are still subject to the allow, block, and drop lists
     * - `allowUnknownMarkup`: Whether to allow non-standard elements which are not custom elements, false by default. If true, elements are still subject to the allow, block, and drop lists
     * - `allowComments`: Whether to retain comments, false by default
     * - `allowProcessingInstructions`: Whether to retain processing instructions, false by default. Processing instructions do not normally appear in HTML documents. This option is an extension to the specification
     * - `nullNamespaceAsHtml`: Whether to interpret elements from the tree in the null namespace as being in the HTML namespace, true by default. Per standard behaviour HTML elements have a namespace URI, but not all PHP-based parsers do this. This may be set to false when sanitizing XML documents. This option is an extension to the specification
     * 
     * The entries in element lists may be strings, in which case these are interpreted as local names in the HTML namespace, or an array with the following keys:
     * 
     * - `name`: The localName of the element
     * - `namespace`: The namespaceURI of the element, a string or null. If omitted the HTML namespace is assumed
     * 
     * The entries in attribute lists are arrays with the following keys
     * 
     * - `name`: The localName of the attribute
     * - `namespace`: The namespaceURI of the attribute. If omitted the null namespace is assumed
     * - `elements`: An indexed array of elements on which to allow the attribute, in the same format as other element lists. The string `"*"` may be supplied instead of an array to mean all elements
     * 
     * @param array $config A configuration to use instead of the default one
     */
    public function __construct(array $config = null) {
        if ($config === null) {
            // use the default configuration if none is specified
            $this->config = self::DEFAULT_CONF;
        } else {
            // otherwise validate the configuration; the specification provides
            //   no clue is to what happens when the configuration is invalid,
            //   so we'll just have to do our best
            $out = [];
            // start with the element lists
            foreach (["allowElements", "blockElements", "dropElements"] as $opt) {
                if (isset($config[$opt]) && is_array($config[$opt])) {
                    foreach ($config[$opt] as $el) {
                        if (is_string($el) && strlen($el)) {
                            // strings are assumed to be in the HTML namespace
                            $ns = self::HTML_NAMESPACE;
                            $name = $el;
                        } elseif (is_array($el) && strlen($el['name'] ?? "")) {
                            $name = $el['name'];
                            if (!array_key_exists("namespace", $el)) {
                                // the namespace key being missing means the HTML namespace
                                $ns = self::HTML_NAMESPACE;
                            } elseif (!isset($el['namespace'])) {
                                // the null namespace is also possible (but will never match in HTML documents)
                                $ns = self::NULL_NAMESPACE;
                            } elseif (is_string($el['namespace'])) {
                                // only use the namespace if it's a string
                                $ns = $el['namespace'];
                            } else {
                                // ignore any other value for the namespace (this is invalid)
                                continue;
                            }
                        }
                        // create any structures which might be missing
                        if (!isset($out[$opt])) {
                            $out[$opt] = [];
                        }
                        if (!isset($out[$opt][$ns])) {
                            $out[$opt][$ns] = [];
                        }
                        // add the element
                        $out[$opt][$ns][$name] = true;
                    }
                }
            }
            // continue with attribute lists
            foreach (["allowAttributes", "dropAttributes"] as $opt) {
                if (isset($config[$opt]) && is_array($config[$opt])) {
                    foreach ($config[$opt] as $attr) {
                        if (is_array($attr) && strlen($attr['name'] ?? "" && isset($attr['elements']))) {
                            $name = $attr['name'];
                            if (!isset($attr['namespace'])) {
                                // the null namespace is assumed
                                $ns = self::NULL_NAMESPACE;
                            } elseif (is_string($attr['namespace'])) {
                                // only use the namespace if it's a string
                                $ns = $attr['namespace'];
                            } else {
                                // ignore any other value for the namespace (this is invalid)
                                continue;
                            }
                            // now check the list of elements
                            if ($attr['elements'] === "*") {
                                // the special string "*" means any element
                                $list = "*";
                            } elseif (is_array($attr['elements'])) {
                                // otherwise the element list is like the element lists handled above
                                $list = [];
                                foreach ($attr['elements'] as $el) {
                                    if (is_string($el) && strlen($el)) {
                                        // strings are assumed to be in the HTML namespace
                                        $eNs = self::HTML_NAMESPACE;
                                        $eName = $el;
                                    } elseif (is_array($el) && strlen($el['name'] ?? "")) {
                                        $eName = $el['name'];
                                        if (!array_key_exists("namespace", $el)) {
                                            // the namespace key being missing means the HTML namespace
                                            $eNs = self::HTML_NAMESPACE;
                                        } elseif (!isset($el['namespace'])) {
                                            // the null namespace is also possible (but will never match in HTML documents)
                                            $eNs = self::NULL_NAMESPACE;
                                        } elseif (is_string($el['namespace'])) {
                                            // only use the namespace if it's a string
                                            $eNs = $el['namespace'];
                                        } else {
                                            // ignore any other value for the namespace (this is invalid)
                                            continue;
                                        }
                                    }
                                    // create any structures which might be missing
                                    if (!isset($list[$eNs])) {
                                        $list[$eNs] = [];
                                    }
                                    // add the element
                                    $list[$eNs][$eName] = true;
                                }
                            } else {
                                // ignore any other value for the elements list (this is invalid)
                                continue;
                            }
                            if (!$list) {
                                // an empty element list is non-functional, so we can skip the attribute
                                continue;
                            }
                            // create any structures which might be missing
                            if (!isset($out[$opt])) {
                                $out[$opt] = [];
                            }
                            if (!isset($out[$opt][$ns])) {
                                $out[$opt][$ns] = [];
                            }
                            // add the attribute
                            $out[$opt][$ns][$name] = $list;
                        }
                    }
                }
            }
            // finally handle the boolean options
            foreach (["allowCustomElements", "allowUnknownMarkup", "allowComments", "allowProcessingInstructions", "nullNamespaceAsHtml"] as $opt) {
                if (isset($config[$opt])) {
                    $out[$opt] = (bool) $config[$opt];
                }
            }
            // use the normalized configuration
            $this->config = $out;
        }
    }

    /** Returns a normalized representation of the effective configuration */
    public function getConfiguration(): array {
        return $this->exportConfiguration($this->config);
    }

    /** Returns the default configuration */
    public function getDefaultConfiguration(): array {
        return $this->exportConfiguration(self::DEFAULT_CONF);
    }

    /** Converts a configuration from the internal representation to the external representation */
    protected function exportConfiguration(array $config): array {
        $out = [];
        // start with the element lists
        foreach (["allowElements", "blockElements", "dropElements"] as $opt) {
            if (isset($config[$opt])) {
                $out[$opt] = [];
                ksort($config[$opt]);
                foreach ($config[$opt] as $ns => $set) {
                    ksort($set);
                    foreach ($set as $el => $t) {
                        if ($ns === self::HTML_NAMESPACE) {
                            $out[$opt][] = $el;
                        } else {
                            $out[$opt][] = ['name' => $el, 'namespace' => $ns];
                        }
                    }
                }
            }
        }
        // continue with attribute lists
        foreach (["allowAttributes", "dropAttributes"] as $opt) {
            if (isset($config[$opt])) {
                $out[$opt] = [];
                ksort($config[$opt]);
                foreach ($config[$opt] as $ns => $set) {
                    ksort($set);
                    foreach ($set as $attr => $elems) {
                        $list = [];
                        ksort($elems);
                        foreach ($elems as $eNs => $eSet) {
                            ksort($eSet);
                            foreach ($eSet as $el => $t) {
                                if ($eNs === self::HTML_NAMESPACE) {
                                    $list[] = $el;
                                } else {
                                    $list[] = ['name' => $el, 'namespace' => $eNs];
                                }
                            }
                        }
                        if ($ns === self::NULL_NAMESPACE) {
                            $out[$opt][] = ['name' => $attr, 'elements' => $list];
                        } else {
                            $out[$opt][] = ['name' => $attr, 'namespace' => $ns, 'elements' => $list];
                        }
                    }
                }
            }
        }
        // finally handle the boolean options
        foreach (["allowCustomElements", "allowUnknownMarkup", "allowComments", "allowProcessingInstructions", "nullNamespaceAsHtml"] as $opt) {
            if (isset($config[$opt])) {
                $out[$opt] = $config[$opt];
            }
        }
        // return the transformed configuration
        return $out;
    }

    /** Sanitizes a document or document fragment according to the loaded configuration
     * 
     * The returned document fragment contains clones of all valid nodes, leaving the original input untouched
     * 
     * @param \DOMDocument|\DOMDocumentFragment $input The document or document fragment to sanitize
     */
    public function sanitize(\DOMNode $input): \DOMDocumentFragment {
        if (!($input instanceof \DOMDocument || $input instanceof \DOMDocumentFragment)) {
            throw new \InvalidArgumentException("Argument \$input must be of type \DOMDocument|\DOMDocumentFragment");
        }
        # To sanitize a given input of type Document or DocumentFragment
        #   run these steps:
        # Let fragment be the result of running the create a document fragment
        #   algorithm on input.
        $fragment = $this->createDocumentFragment($input);
        # Run the sanitize a document fragment algorithm on fragment.
        $this->sanitizeDocumentFragment($fragment);
        # Return fragment.
        return $fragment;
    }

    /** Creates a copy of the input as a document fragment, which can then be safely manipulated
     * 
     * @param \DOMDocument|\DOMDocumentFragment $input The input to clone
     */
    protected function createDocumentFragment(\DOMNode $input): \DOMDocumentFragment {
        assert($input instanceof \DOMDocument || $input instanceof \DOMDocumentFragment, new \Exception("Parameter \$input must be of type \DOMDocument|\DOMDocumentFragment"));
        # To create a document fragment named fragment from an input of type
        #   Document or DocumentFragment, run these steps:
        # Let node be null.
        $node = null;
        # Switch based on input’s type:
        #   If input is of type DocumentFragment, then:
        #     Set node to input.
        #   If input is of type Document, then:
        #     Set node to input’s documentElement.
        if ($input instanceof \DOMDocumentFragment) {
            $node = $input;
        } elseif ($input instanceof \DOMDocument) {
            $node = $input->documentElement;
        }
        # Let clone be the result of running clone a node on node with the
        #   clone children flag set.
        $clone = $node->cloneNode(true);
        # Let fragment be a new DocumentFragment whose node document is node’s
        #   node document.
        $fragment = $node->ownerDocument->createDocumentFragment();
        # Append the node clone to fragment.
        $fragment->appendChild($clone);
        # Return fragment.
        return $fragment;
    }

    /** Iterates over a document fragment and sanitizes its nodes
     * 
     * @param \DOMDocumentFragment $fragment The document fragment to sanitize
     */
    protected function sanitizeDocumentFragment(\DOMDocumentFragment $fragment): void {
        # To sanitize a document fragment named fragment with a Sanitizer
        #   sanitizer run these steps:
        # Let m be a map that maps nodes to a sanitize action.
        # Let nodes be a list containing the inclusive descendants of fragment, in tree order.
        // Basically we won't be doing things this way. Rather than treating 
        //   all of the fragment's nodes as a flat list, we'll walk the
        //   fragment and decide as we go, till have visited every node
        $node = $fragment->firstChild;
        # For each node in nodes:
        while ($node) {
            # Let action be the result of running the sanitize a node algorithm on node with sanitizer.
            $action = $this->sanitizeNode($node);
            assert(in_array($action, [self::ACTION_BLOCK, self::ACTION_DROP, self::ACTION_KEEP]), new \Exception("The result of sanitizing a node must be one of the three actions"));
            # Set m[node] to action.
            # For each node in nodes:
            // Again, we're taking action one node at a time; m[node] is simply $action
            if ($action === self::ACTION_DROP) {
                # If m[node] is drop, remove node.
                $victim = $node;
                $node = $this->nextNode($node, false);
                $victim->parentNode->removeChild($victim);
            } else if ($action === self::ACTION_BLOCK) {
                # If m[node] is block, create a DocumentFragment fragment,
                #   append all of node’s children to fragment, and replace
                #   node within node’s parent with fragment.
                // This is a bit confusing because the variable name "fragment"
                //   is re-used; this is a different fragment from the input
                //   to this function
                $victim = $node;
                $node = $this->nextNode($node, true);
                $frag = $victim->ownerDocument->createDocumentFragment();
                while ($victim->firstChild) {
                    $frag->appendChild($victim->firstChild);
                }
                $victim->parentNode->replaceChild($victim, $frag);
            } else {
                # If m[node] is keep, do nothing.
                $node = $this->nextNode($node, true);
            }
        }
    }

    /** Examines a node and returns one of the sanitization actions
     * 
     * Attributes may be removed as part of this function
     * 
     * @param \DOMNode $node The node to examine
     */
    protected function sanitizeNode(\DOMNode $node): int {
        # To sanitize a node named node with sanitizer run these steps:
        # Assert: node is not a Document or DocumentFragment or Attr
        #   or DocumentType node.
        assert(!in_array(get_class($node), ["DOMDocument", "DOMDocumentFragment", "DOMAttr", "DOMDocumentType"]), new \Exception("Invalid node Type ".get_class($node)));
        if ($node instanceof \DOMElement) {
            # If node is an element node:
            # Let element be node.
            $element = $node;
            # For each attr in element’s attribute list:
            foreach ($element->attributes as $attr) {
                # Let attr action be the result of running the sanitize action
                #   for an attribute algorithm on attr and element.
                $attrAction = $this->sanitizeAttribute($attr);
                # If attr action is different from keep, remove an attribute
                #   supplying attr.
                if ($attrAction !== self::ACTION_KEEP) {
                    $element->removeAttributeNode($attr);
                }
            }
            # Run the steps to handle funky elements on element.
            $this->handleFunkyElement($element);
            # Let action be the result of running the sanitize action for an
            #   element on element.
            # Return action.
            return $this->sanitizeElement($element);
        } elseif ($node instanceof \DOMComment) {
            # If node is a Comment node:
            # Let config be sanitizer’s configuration dictionary, or the default configuration if no configuration dictionary was given.
            # If config’s allow comments option exists and |config|[allowComments] is true: Return keep.
            if ($this->config['allowComments'] ?? self::DEFAULT_CONF['allowComments']) {
                return self::ACTION_KEEP;
            }
            # Return drop.
            return self::ACTION_DROP;
        } elseif ($node instanceof \DOMText) {
            # If node is a Text node: Return keep.
            return self::ACTION_KEEP;
        } else {
            # Assert: node is a ProcessingInstruction
            # Return drop.
            //DEVIATION: we allow processing instructions by configuration just like comments
            if ($this->config['allowProcessingInstructions'] ?? self::DEFAULT_CONF['allowProcessingInstructions']) {
                return self::ACTION_KEEP;
            }
            return self::ACTION_DROP;
        }
    }

    protected function sanitizeAttribute(\DOMAttr $attr): int {
        # To determine the sanitize action for an attribute given a Sanitizer
        #   configuration dictionary config, run these steps:
        # Let kind be attribute’s attribute kind.
        $ns = $attr->namespaceURI;
        $name = $attr->localName;
        $eNs = $attr->ownerElement->namespaceURI;
        $eName = $attr->ownerElement->localName;
        $set = self::KNOWN_ATTRIBUTES[$ns][$name][$eNs] ?? [];
        if (!array_intersect($set, [$eName, "*"])) {
            # The attribute kind of an attribute is one of regular
            #   or unknown. Let attribute kind be:
            # - unknown, if the [HTML] specification does not assign any
            #   meaning to attribute’s name.
            $kind = self::KIND_UNKNOWN;
        } else {
            # - regular, otherwise.
            $kind = self::KIND_REGULAR;
        }
        if ($kind === self::KIND_UNKNOWN && ($this->config['allowUnknownMarkup'] ?? self::DEFAULT_CONF['allowUnknownMarkup'])) {
            # If kind is unknown and if config["allowUnknownMarkup"] does not exist or it config["allowUnknownMarkup"] is false: Return drop.
            return self::ACTION_DROP;
        } elseif ($kind === self::KIND_REGULAR) {}
        # If kind is regular and attribute’s local name does not match any name in the baseline attribute allow list: Return drop.
        # If attribute matches any attribute match list in config’s attribute drop list: Return drop.
        # If attribute allow list exists in config:
        # Then let allow list be |config|["allowAttributes"].
        # Otherwise: Let allow list be the default configuration's attribute allow list.
        # If attribute does not match any attribute match list in allow list: Return drop.
        # Return keep.
    }

    /** Finds the next node in tree order after $node, if any
     * 
     * @param \DOMNode $node The context node
     * @param bool $considerChildren Whether or not child nodes are valid next nodes
     */
    protected function nextNode(\DOMNode $node, bool $considerChildren): ?\DOMNode {
        if ($node->hasChildNodes() && $considerChildren) {
            return $node->firstChild;
        }
        $next = $node->nextSibling;
        while (!$next) {
            $node = $node->parentNode;
            if (!$node) {
                return null;
            }
            $next = $node->nextSibling;
        }
        return $next;
    }
}