diff --git a/CHANGELOG b/CHANGELOG
index c2ce336..b0b42f4 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -5,10 +5,12 @@ New features:
 - Support for the Fever protocol (see README.md for details)
 - Command line functionality for clearing a password, disabling the account
 - Command line options for dealing with Fever passwords
+- Command line functionality for exporting subscriptions to OPML
 - Command line documentation of all commands and options
 
 Bug fixes:
 - Treat command line option -h the same as --help
+- Sort Tiny Tiny RSS special feeds according to special ordering
 
 Version 0.7.1 (2019-03-25)
 ==========================
diff --git a/README.md b/README.md
index 08dab43..f568a4a 100644
--- a/README.md
+++ b/README.md
@@ -148,7 +148,6 @@ We are not aware of any other extensions to the TTRSS protocol. If you know of a
     - Full-text search is not yet employed with any database, including PostgreSQL
 - Article hashes are normally SHA1; The Arsse uses SHA256 hashes
 - Article attachments normally have unique IDs; The Arsse always gives attachments an ID of `"0"`
-- The default sort order of the `getHeadlines` operation normally uses custom sorting for "special" feeds; The Arsse's default sort order is equivalent to `feed_dates` for all feeds
 - The `getCounters` operation normally omits members with zero unread; The Arsse includes everything to appease some clients
 
 #### Other notes
diff --git a/UPGRADING b/UPGRADING
index a837396..ea3c84a 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -10,6 +10,12 @@ usually prudent:
 - If installing from source, update dependencies with:
   `composer install -o --no-dev`
 
+Upgrading from 0.7.1 to 0.8.0
+=============================
+
+- The database schema has changed from rev4 to rev5; if upgrading the database
+  manually, apply the 4.sql file
+
 
 Upgrading from 0.5.1 to 0.6.0
 =============================
diff --git a/arsse.php b/arsse.php
index 407be03..0cfa0ae 100644
--- a/arsse.php
+++ b/arsse.php
@@ -25,7 +25,7 @@ if (\PHP_SAPI === "cli") {
     $conf = file_exists(BASE."config.php") ? new Conf(BASE."config.php") : new Conf;
     Arsse::load($conf);
     // handle Web requests
-    $emitter = new \Zend\Diactoros\Response\SapiEmitter();
+    $emitter = new \Zend\HttpHandlerRunner\Emitter\SapiEmitter;
     $response = (new REST)->dispatch();
     $emitter->emit($response);
 }
diff --git a/composer.json b/composer.json
index 0669d65..3fdd1c7 100644
--- a/composer.json
+++ b/composer.json
@@ -18,16 +18,17 @@
 
     ],
     "require": {
-        "php": "^7.0",
+        "php": "7.*",
         "ext-intl": "*",
         "ext-json": "*",
         "ext-hash": "*",
         "ext-dom": "*",
         "p3k/picofeed": "0.1.*",
-        "hosteurope/password-generator": "^1.0",
-        "docopt/docopt": "^1.0",
-        "jkingweb/druuid": "^3.0",
-        "zendframework/zend-diactoros": "^1.6"
+        "hosteurope/password-generator": "1.*",
+        "docopt/docopt": "1.*",
+        "jkingweb/druuid": "3.*",
+        "zendframework/zend-diactoros": "2.*",
+        "zendframework/zend-httphandlerrunner": "1.*"
     },
     "require-dev": {
         "bamarni/composer-bin-plugin": "*"
diff --git a/composer.lock b/composer.lock
index 986e47c..54a7444 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "f61a02cd168914d91847b89dcd00d464",
+    "content-hash": "c2b0698669d89268ffb995a5e1d6667a",
     "packages": [
         {
             "name": "docopt/docopt",
@@ -190,6 +190,58 @@
             "homepage": "https://github.com/miniflux/picoFeed",
             "time": "2017-11-30T00:16:58+00:00"
         },
+        {
+            "name": "psr/http-factory",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-factory.git",
+                "reference": "12ac7fcd07e5b077433f5f2bee95b3a771bf61be"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-factory/zipball/12ac7fcd07e5b077433f5f2bee95b3a771bf61be",
+                "reference": "12ac7fcd07e5b077433f5f2bee95b3a771bf61be",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0.0",
+                "psr/http-message": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Message\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interfaces for PSR-7 HTTP message factories",
+            "keywords": [
+                "factory",
+                "http",
+                "message",
+                "psr",
+                "psr-17",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "time": "2019-04-30T12:38:16+00:00"
+        },
         {
             "name": "psr/http-message",
             "version": "1.0.1",
@@ -240,40 +292,96 @@
             ],
             "time": "2016-08-06T14:39:51+00:00"
         },
+        {
+            "name": "psr/http-server-handler",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-server-handler.git",
+                "reference": "aff2f80e33b7f026ec96bb42f63242dc50ffcae7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-server-handler/zipball/aff2f80e33b7f026ec96bb42f63242dc50ffcae7",
+                "reference": "aff2f80e33b7f026ec96bb42f63242dc50ffcae7",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0",
+                "psr/http-message": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Server\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP server-side request handler",
+            "keywords": [
+                "handler",
+                "http",
+                "http-interop",
+                "psr",
+                "psr-15",
+                "psr-7",
+                "request",
+                "response",
+                "server"
+            ],
+            "time": "2018-10-30T16:46:14+00:00"
+        },
         {
             "name": "zendframework/zend-diactoros",
-            "version": "1.8.6",
+            "version": "2.1.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/zendframework/zend-diactoros.git",
-                "reference": "20da13beba0dde8fb648be3cc19765732790f46e"
+                "reference": "279723778c40164bcf984a2df12ff2c6ec5e61c1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/zendframework/zend-diactoros/zipball/20da13beba0dde8fb648be3cc19765732790f46e",
-                "reference": "20da13beba0dde8fb648be3cc19765732790f46e",
+                "url": "https://api.github.com/repos/zendframework/zend-diactoros/zipball/279723778c40164bcf984a2df12ff2c6ec5e61c1",
+                "reference": "279723778c40164bcf984a2df12ff2c6ec5e61c1",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.6 || ^7.0",
+                "php": "^7.1",
+                "psr/http-factory": "^1.0",
                 "psr/http-message": "^1.0"
             },
             "provide": {
+                "psr/http-factory-implementation": "1.0",
                 "psr/http-message-implementation": "1.0"
             },
             "require-dev": {
                 "ext-dom": "*",
                 "ext-libxml": "*",
+                "http-interop/http-factory-tests": "^0.5.0",
                 "php-http/psr7-integration-tests": "dev-master",
-                "phpunit/phpunit": "^5.7.16 || ^6.0.8 || ^7.2.7",
-                "zendframework/zend-coding-standard": "~1.0"
+                "phpunit/phpunit": "^7.0.2",
+                "zendframework/zend-coding-standard": "~1.0.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.8.x-dev",
-                    "dev-develop": "1.9.x-dev",
-                    "dev-release-2.0": "2.0.x-dev"
+                    "dev-master": "2.1.x-dev",
+                    "dev-develop": "2.2.x-dev",
+                    "dev-release-1.8": "1.8.x-dev"
                 }
             },
             "autoload": {
@@ -293,16 +401,70 @@
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "BSD-2-Clause"
+                "BSD-3-Clause"
             ],
             "description": "PSR HTTP Message implementations",
-            "homepage": "https://github.com/zendframework/zend-diactoros",
             "keywords": [
                 "http",
                 "psr",
                 "psr-7"
             ],
-            "time": "2018-09-05T19:29:37+00:00"
+            "time": "2019-07-10T16:13:25+00:00"
+        },
+        {
+            "name": "zendframework/zend-httphandlerrunner",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/zendframework/zend-httphandlerrunner.git",
+                "reference": "75fb12751fe9d6e392cce1ee0d687dacae2db787"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/zendframework/zend-httphandlerrunner/zipball/75fb12751fe9d6e392cce1ee0d687dacae2db787",
+                "reference": "75fb12751fe9d6e392cce1ee0d687dacae2db787",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1",
+                "psr/http-message": "^1.0",
+                "psr/http-message-implementation": "^1.0",
+                "psr/http-server-handler": "^1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^7.0.2",
+                "zendframework/zend-coding-standard": "~1.0.0",
+                "zendframework/zend-diactoros": "^1.7 || ^2.1.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1.x-dev",
+                    "dev-develop": "1.2.x-dev"
+                },
+                "zf": {
+                    "config-provider": "Zend\\HttpHandlerRunner\\ConfigProvider"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Zend\\HttpHandlerRunner\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "description": "Execute PSR-15 RequestHandlerInterface instances and emit responses they generate.",
+            "keywords": [
+                "ZendFramework",
+                "components",
+                "expressive",
+                "psr-15",
+                "psr-7",
+                "zf"
+            ],
+            "time": "2019-02-19T18:20:34+00:00"
         },
         {
             "name": "zendframework/zendxml",
@@ -398,7 +560,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^7.0",
+        "php": "7.*",
         "ext-intl": "*",
         "ext-json": "*",
         "ext-hash": "*",
diff --git a/lib/Context/Context.php b/lib/Context/Context.php
index 858409f..fb1236a 100644
--- a/lib/Context/Context.php
+++ b/lib/Context/Context.php
@@ -9,7 +9,6 @@ namespace JKingWeb\Arsse\Context;
 class Context extends ExclusionContext {
     /** @var ExclusionContext */
     public $not;
-    public $reverse = false;
     public $limit = 0;
     public $offset = 0;
     public $unread;
@@ -31,10 +30,6 @@ class Context extends ExclusionContext {
         unset($this->not);
     }
 
-    public function reverse(bool $spec = null) {
-        return $this->act(__FUNCTION__, func_num_args(), $spec);
-    }
-
     public function limit(int $spec = null) {
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
diff --git a/lib/Context/ExclusionContext.php b/lib/Context/ExclusionContext.php
index 1f91994..e7323ea 100644
--- a/lib/Context/ExclusionContext.php
+++ b/lib/Context/ExclusionContext.php
@@ -11,16 +11,23 @@ use JKingWeb\Arsse\Misc\Date;
 
 class ExclusionContext {
     public $folder;
+    public $folders;
     public $folderShallow;
+    public $foldersShallow;
     public $tag;
+    public $tags;
     public $tagName;
+    public $tagNames;
     public $subscription;
+    public $subscriptions;
     public $edition;
-    public $article;
     public $editions;
+    public $article;
     public $articles;
     public $label;
+    public $labels;
     public $labelName;
+    public $labelNames;
     public $annotationTerms;
     public $searchTerms;
     public $titleTerms;
@@ -42,6 +49,7 @@ class ExclusionContext {
     }
 
     public function __clone() {
+        // if the context was cloned because its parent was cloned, change the parent to the clone
         if ($this->parent) {
             $t = debug_backtrace(\DEBUG_BACKTRACE_IGNORE_ARGS | \DEBUG_BACKTRACE_PROVIDE_OBJECT, 2)[1];
             if (($t['object'] ?? null) instanceof self && $t['function'] === "__clone") {
@@ -70,16 +78,18 @@ class ExclusionContext {
         }
     }
 
-    protected function cleanIdArray(array $spec): array {
+    protected function cleanIdArray(array $spec, bool $allowZero = false): array {
         $spec = array_values($spec);
         for ($a = 0; $a < sizeof($spec); $a++) {
-            if (ValueInfo::id($spec[$a])) {
+            if (ValueInfo::id($spec[$a], $allowZero)) {
                 $spec[$a] = (int) $spec[$a];
             } else {
-                $spec[$a] = 0;
+                $spec[$a] = null;
             }
         }
-        return array_values(array_unique(array_filter($spec)));
+        return array_values(array_unique(array_filter($spec, function($v) {
+            return !is_null($v);
+        })));
     }
 
     protected function cleanStringArray(array $spec): array {
@@ -99,22 +109,57 @@ class ExclusionContext {
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
 
+    public function folders(array $spec = null) {
+        if (isset($spec)) {
+            $spec = $this->cleanIdArray($spec, true);
+        }
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
+
     public function folderShallow(int $spec = null) {
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
 
+    public function foldersShallow(array $spec = null) {
+        if (isset($spec)) {
+            $spec = $this->cleanIdArray($spec, true);
+        }
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
+
     public function tag(int $spec = null) {
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
 
+    public function tags(array $spec = null) {
+        if (isset($spec)) {
+            $spec = $this->cleanIdArray($spec);
+        }
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
+
     public function tagName(string $spec = null) {
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
 
+    public function tagNames(array $spec = null) {
+        if (isset($spec)) {
+            $spec = $this->cleanStringArray($spec);
+        }
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
+
     public function subscription(int $spec = null) {
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
 
+    public function subscriptions(array $spec = null) {
+        if (isset($spec)) {
+            $spec = $this->cleanIdArray($spec);
+        }
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
+
     public function edition(int $spec = null) {
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
@@ -141,10 +186,24 @@ class ExclusionContext {
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
 
+    public function labels(array $spec = null) {
+        if (isset($spec)) {
+            $spec = $this->cleanIdArray($spec);
+        }
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
+
     public function labelName(string $spec = null) {
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
 
+    public function labelNames(array $spec = null) {
+        if (isset($spec)) {
+            $spec = $this->cleanStringArray($spec);
+        }
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
+
     public function annotationTerms(array $spec = null) {
         if (isset($spec)) {
             $spec = $this->cleanStringArray($spec);
diff --git a/lib/Database.php b/lib/Database.php
index ef91591..daca234 100644
--- a/lib/Database.php
+++ b/lib/Database.php
@@ -1239,6 +1239,37 @@ class Database {
         )->run($feedID, $vId, $vHashUT, $vHashUC, $vHashTC);
     }
 
+    /** Returns an associative array of result column names and their SQL computations for article queries
+     *
+     * This is used for whitelisting and defining both output column and order-by columns, as well as for resolution of some context options
+     */
+    protected function articleColumns(): array {
+        $greatest = $this->db->sqlToken("greatest");
+        return [
+            'id' => "arsse_articles.id",
+            'edition' => "latest_editions.edition",
+            'url' => "arsse_articles.url",
+            'title' => "arsse_articles.title",
+            'author' => "arsse_articles.author",
+            'content' => "arsse_articles.content",
+            'guid' => "arsse_articles.guid",
+            'fingerprint' => "arsse_articles.url_title_hash || ':' || arsse_articles.url_content_hash || ':' || arsse_articles.title_content_hash",
+            'folder' => "coalesce(arsse_subscriptions.folder,0)",
+            'subscription' => "arsse_subscriptions.id",
+            'feed' => "arsse_subscriptions.feed",
+            'starred' => "coalesce(arsse_marks.starred,0)",
+            'unread' => "abs(coalesce(arsse_marks.read,0) - 1)",
+            'note' => "coalesce(arsse_marks.note,'')",
+            'published_date' => "arsse_articles.published",
+            'edited_date' => "arsse_articles.edited",
+            'modified_date' => "arsse_articles.modified",
+            'marked_date' => "$greatest(arsse_articles.modified, coalesce(arsse_marks.modified, '0001-01-01 00:00:00'), coalesce(label_stats.modified, '0001-01-01 00:00:00'))",
+            'subscription_title' => "coalesce(arsse_subscriptions.title, arsse_feeds.title)",
+            'media_url' => "arsse_enclosures.url",
+            'media_type' => "arsse_enclosures.type",
+        ];
+    }
+
     /** Computes an SQL query to find and retrieve data about articles in the database
      *
      * If an empty column list is supplied, a count of articles matching the context is queried instead
@@ -1271,48 +1302,30 @@ class Database {
             $this->labelValidateId($user, $context->labelName, true);
         }
         // prepare the output column list; the column definitions are also used later
-        $greatest = $this->db->sqlToken("greatest");
-        $colDefs = [
-            'id' => "arsse_articles.id",
-            'edition' => "latest_editions.edition",
-            'url' => "arsse_articles.url",
-            'title' => "arsse_articles.title",
-            'author' => "arsse_articles.author",
-            'content' => "arsse_articles.content",
-            'guid' => "arsse_articles.guid",
-            'fingerprint' => "arsse_articles.url_title_hash || ':' || arsse_articles.url_content_hash || ':' || arsse_articles.title_content_hash",
-            'folder' => "coalesce(arsse_subscriptions.folder,0)",
-            'subscription' => "arsse_subscriptions.id",
-            'feed' => "arsse_subscriptions.feed",
-            'starred' => "coalesce(arsse_marks.starred,0)",
-            'unread' => "abs(coalesce(arsse_marks.read,0) - 1)",
-            'note' => "coalesce(arsse_marks.note,'')",
-            'published_date' => "arsse_articles.published",
-            'edited_date' => "arsse_articles.edited",
-            'modified_date' => "arsse_articles.modified",
-            'marked_date' => "$greatest(arsse_articles.modified, coalesce(arsse_marks.modified, '0001-01-01 00:00:00'), coalesce(label_stats.modified, '0001-01-01 00:00:00'))",
-            'subscription_title' => "coalesce(arsse_subscriptions.title, arsse_feeds.title)",
-            'media_url' => "arsse_enclosures.url",
-            'media_type' => "arsse_enclosures.type",
-        ];
+        $colDefs = $this->articleColumns();
         if (!$cols) {
-            // if no columns are specified return a count
-            $columns = "count(distinct arsse_articles.id) as count";
+            // if no columns are specified return a count; don't borther with sorting
+            $outColumns = "count(distinct arsse_articles.id) as count";
         } else {
-            $columns = [];
+            // normalize requested output and sorting columns
+            $norm = function($v) {
+                return trim(strtolower(ValueInfo::normalize($v, ValueInfo::T_STRING)));
+            };
+            $cols = array_map($norm, $cols);
+            // make an output column list
+            $outColumns = [];
             foreach ($cols as $col) {
-                $col = trim(strtolower($col));
                 if (!isset($colDefs[$col])) {
                     continue;
                 }
-                $columns[] = $colDefs[$col]." as ".$col;
+                $outColumns[] = $colDefs[$col]." as ".$col;
             }
-            $columns = implode(",", $columns);
+            $outColumns = implode(",", $outColumns);
         }
         // define the basic query, to which we add lots of stuff where necessary
         $q = new Query(
             "SELECT 
-                $columns
+                $outColumns
             from arsse_articles
             join arsse_subscriptions on arsse_subscriptions.feed = arsse_articles.feed and arsse_subscriptions.owner = ?
             join arsse_feeds on arsse_subscriptions.feed = arsse_feeds.id
@@ -1344,7 +1357,9 @@ class Database {
             "markedSince"      => ["marked_date",   ">=", "datetime", "notMarkedSince"],
             "notMarkedSince"   => ["marked_date",   "<=", "datetime", "markedSince"],
             "folderShallow"    => ["folder",        "=",  "int",      ""],
+            "foldersShallow"   => ["folder",        "in", "int",      ""],
             "subscription"     => ["subscription",  "=",  "int",      ""],
+            "subscriptions"    => ["subscription",  "in", "int",      ""],
             "unread"           => ["unread",        "=",  "bool",     ""],
             "starred"          => ["starred",       "=",  "bool",     ""],
         ];
@@ -1395,6 +1410,79 @@ class Database {
                 $q->setWhereNot("{$colDefs[$col]} $op ?", $type, $context->not->$m);
             }
         }
+        // handle labels and tags
+        $options = [
+            'label' => [
+                'match_col' => "arsse_articles.id",
+                'cte_name' => "labelled",
+                'cte_cols' => ["article", "label_id", "label_name"],
+                'cte_body' => "SELECT m.article, l.id, l.name from arsse_label_members as m join arsse_labels as l on l.id = m.label where l.owner = ? and m.assigned = 1",
+                'cte_types' => ["str"],
+                'cte_values' => [$user],
+                'options' => [
+                    'label'      => ['use_name' => false, 'multi' => false],
+                    'labels'     => ['use_name' => false, 'multi' => true],
+                    'labelName'  => ['use_name' => true,  'multi' => false],
+                    'labelNames' => ['use_name' => true,  'multi' => true],
+                ],
+            ],
+            'tag' => [
+                'match_col' => "arsse_subscriptions.id",
+                'cte_name' => "tagged",
+                'cte_cols' => ["subscription", "tag_id", "tag_name"],
+                'cte_body' => "SELECT m.subscription, t.id, t.name from arsse_tag_members as m join arsse_tags as t on t.id = m.tag where t.owner = ? and m.assigned = 1",
+                'cte_types' => ["str"],
+                'cte_values' => [$user],
+                'options' => [
+                    'tag'      => ['use_name' => false, 'multi' => false],
+                    'tags'     => ['use_name' => false, 'multi' => true],
+                    'tagName'  => ['use_name' => true,  'multi' => false],
+                    'tagNames' => ['use_name' => true,  'multi' => true],
+                ],
+            ],
+        ];
+        foreach ($options as $opt) {
+            $seen = false;
+            $match = $opt['match_col'];
+            $table = $opt['cte_name'];
+            foreach ($opt['options'] as $m => $props) {
+                $named = $props['use_name'];
+                $multi = $props['multi'];
+                $selection = $opt['cte_cols'][0];
+                $col = $opt['cte_cols'][$named ? 2 : 1];
+                if ($context->$m()) {
+                    $seen = true;
+                    if (!$context->$m) {
+                        throw new Db\ExceptionInput("tooShort", ['field' => $m, 'action' => $this->caller(), 'min' => 1]); // must have at least one array element
+                    }
+                    if ($multi) {
+                        list($test, $types, $values) = $this->generateIn($context->$m, $named ? "str" : "int");
+                        $test = "in ($test)";
+                    } else {
+                        $test = "= ?";
+                        $types = $named ? "str" : "int";
+                        $values = $context->$m;
+                    }
+                    $q->setWhere("$match in (select $selection from $table where $col $test)", $types, $values);
+                }
+                if ($context->not->$m()) {
+                    $seen = true;
+                    if ($multi) {
+                        list($test, $types, $values) = $this->generateIn($context->not->$m, $named ? "str" : "int");
+                        $test = "in ($test)";
+                    } else {
+                        $test = "= ?";
+                        $types = $named ? "str" : "int";
+                        $values = $context->not->$m;
+                    }
+                    $q->setWhereNot("$match in (select $selection from $table where $col $test)", $types, $values);
+                }
+            }
+            if ($seen) {
+                $spec = $opt['cte_name']."(".implode(",", $opt['cte_cols']).")";
+                $q->setCTE($spec, $opt['cte_body'], $opt['cte_types'], $opt['cte_values']);
+            }
+        }
         // handle complex context options
         if ($context->annotated()) {
             $comp = ($context->annotated) ? "<>" : "=";
@@ -1405,48 +1493,32 @@ class Database {
             $op = $context->labelled ? ">" : "=";
             $q->setWhere("coalesce(label_stats.assigned,0) $op 0");
         }
-        if ($context->label() || $context->not->label() || $context->labelName() || $context->not->labelName()) {
-            $q->setCTE("labelled(article,label_id,label_name)", "SELECT m.article, l.id, l.name from arsse_label_members as m join arsse_labels as l on l.id = m.label where l.owner = ? and m.assigned = 1", "str", $user);
-            if ($context->label()) {
-                $q->setWhere("arsse_articles.id in (select article from labelled where label_id = ?)", "int", $context->label);
-            }
-            if ($context->not->label()) {
-                $q->setWhereNot("arsse_articles.id in (select article from labelled where label_id = ?)", "int", $context->not->label);
-            }
-            if ($context->labelName()) {
-                $q->setWhere("arsse_articles.id in (select article from labelled where label_name = ?)", "str", $context->labelName);
-            }
-            if ($context->not->labelName()) {
-                $q->setWhereNot("arsse_articles.id in (select article from labelled where label_name = ?)", "str", $context->not->labelName);
-            }
-        }
-        if ($context->tag() || $context->not->tag() || $context->tagName() || $context->not->tagName()) {
-            $q->setCTE("tagged(id,name,subscription)", "SELECT arsse_tags.id, arsse_tags.name, arsse_tag_members.subscription FROM arsse_tag_members join arsse_tags on arsse_tags.id = arsse_tag_members.tag WHERE arsse_tags.owner = ? and assigned = 1", "str", $user);
-            if ($context->tag()) {
-                $q->setWhere("arsse_subscriptions.id in (select subscription from tagged where id = ?)", "int", $context->tag);
-            }
-            if ($context->not->tag()) {
-                $q->setWhereNot("arsse_subscriptions.id in (select subscription from tagged where id = ?)", "int", $context->not->tag);
-            }
-            if ($context->tagName()) {
-                $q->setWhere("arsse_subscriptions.id in (select subscription from tagged where name = ?)", "str", $context->tagName);
-            }
-            if ($context->not->tagName()) {
-                $q->setWhereNot("arsse_subscriptions.id in (select subscription from tagged where name = ?)", "str", $context->not->tagName);
-            }
-        }
         if ($context->folder()) {
             // add a common table expression to list the folder and its children so that we select from the entire subtree
-            $q->setCTE("folders(folder)", "SELECT ? union select id from arsse_folders join folders on parent = folder", "int", $context->folder);
+            $q->setCTE("folders(folder)", "SELECT ? union select id from arsse_folders join folders on coalesce(parent,0) = folder", "int", $context->folder);
             // limit subscriptions to the listed folders
             $q->setWhere("coalesce(arsse_subscriptions.folder,0) in (select folder from folders)");
         }
+        if ($context->folders()) {
+            list($inClause, $inTypes, $inValues) = $this->generateIn($context->folders, "int");
+            // add a common table expression to list the folders and their children so that we select from the entire subtree
+            $q->setCTE("folders_multi(folder)", "SELECT id as folder from (select id from (select 0 as id union select id from arsse_folders where owner = ?) as f where id in ($inClause)) as folders_multi union select id from arsse_folders join folders_multi on coalesce(parent,0) = folder", ["str", $inTypes], [$user, $inValues]);
+            // limit subscriptions to the listed folders
+            $q->setWhere("coalesce(arsse_subscriptions.folder,0) in (select folder from folders_multi)");
+        }
         if ($context->not->folder()) {
             // add a common table expression to list the folder and its children so that we exclude from the entire subtree
-            $q->setCTE("folders_excluded(folder)", "SELECT ? union select id from arsse_folders join folders_excluded on parent = folder", "int", $context->not->folder);
+            $q->setCTE("folders_excluded(folder)", "SELECT ? union select id from arsse_folders join folders_excluded on coalesce(parent,0) = folder", "int", $context->not->folder);
             // excluded any subscriptions in the listed folders
             $q->setWhereNot("coalesce(arsse_subscriptions.folder,0) in (select folder from folders_excluded)");
         }
+        if ($context->not->folders()) {
+            list($inClause, $inTypes, $inValues) = $this->generateIn($context->not->folders, "int");
+            // add a common table expression to list the folders and their children so that we select from the entire subtree
+            $q->setCTE("folders_multi_excluded(folder)", "SELECT id as folder from (select id from (select 0 as id union select id from arsse_folders where owner = ?) as f where id in ($inClause)) as folders_multi_excluded union select id from arsse_folders join folders_multi_excluded on coalesce(parent,0) = folder", ["str", $inTypes], [$user, $inValues]);
+            // limit subscriptions to the listed folders
+            $q->setWhereNot("coalesce(arsse_subscriptions.folder,0) in (select folder from folders_multi_excluded)");
+        }
         // handle text-matching context options
         $options = [
             "titleTerms"      => ["arsse_articles.title"],
@@ -1454,20 +1526,20 @@ class Database {
             "authorTerms"     => ["arsse_articles.author"],
             "annotationTerms" => ["arsse_marks.note"],
         ];
-        foreach ($options as $m => $cols) {
+        foreach ($options as $m => $columns) {
             if (!$context->$m()) {
                 continue;
             } elseif (!$context->$m) {
                 throw new Db\ExceptionInput("tooShort", ['field' => $m, 'action' => $this->caller(), 'min' => 1]); // must have at least one array element
             }
-            $q->setWhere(...$this->generateSearch($context->$m, $cols));
+            $q->setWhere(...$this->generateSearch($context->$m, $columns));
         }
         // further handle exclusionary text-matching context options
-        foreach ($options as $m => $cols) {
+        foreach ($options as $m => $columns) {
             if (!$context->not->$m() || !$context->not->$m) {
                 continue;
             }
-            $q->setWhereNot(...$this->generateSearch($context->not->$m, $cols, true));
+            $q->setWhereNot(...$this->generateSearch($context->not->$m, $columns, true));
         }
         // return the query
         return $q;
@@ -1479,16 +1551,47 @@ class Database {
      *
      * @param string $user The user whose articles are to be listed
      * @param Context $context The search context
-     * @param array $cols The columns to return in the result set, any of: id, edition, url, title, author, content, guid, fingerprint, folder, subscription, feed, starred, unread, note, published_date, edited_date, modified_date, marked_date, subscription_title, media_url, media_type
+     * @param array $fieldss The columns to return in the result set, any of: id, edition, url, title, author, content, guid, fingerprint, folder, subscription, feed, starred, unread, note, published_date, edited_date, modified_date, marked_date, subscription_title, media_url, media_type
+     * @param array $sort The columns to sort the result by eg. "edition desc" in decreasing order of importance
      */
-    public function articleList(string $user, Context $context = null, array $fields = ["id"]): Db\Result {
+    public function articleList(string $user, Context $context = null, array $fields = ["id"], array $sort = []): Db\Result {
         if (!Arsse::$user->authorize($user, __FUNCTION__)) {
             throw new User\ExceptionAuthz("notAuthorized", ["action" => __FUNCTION__, "user" => $user]);
         }
+        // make a base query based on context and output columns
         $context = $context ?? new Context;
         $q = $this->articleQuery($user, $context, $fields);
-        $q->setOrder("arsse_articles.edited".($context->reverse ? " desc" : ""));
-        $q->setOrder("latest_editions.edition".($context->reverse ? " desc" : ""));
+        // make an ORDER BY column list
+        $colDefs = $this->articleColumns();
+        // normalize requested output and sorting columns
+        $norm = function($v) {
+            return trim(strtolower((string) $v));
+        };
+        $fields = array_map($norm, $fields);
+        $sort = array_map($norm, $sort);
+        foreach ($sort as $spec) {
+            $col = explode(" ", $spec, 2);
+            $order = $col[1] ?? "";
+            $col = $col[0];
+            if ($order === "desc") {
+                $order = " desc";
+            } elseif ($order === "asc" || $order === "") {
+                $order = "";
+            } else {
+                // column direction spec is bogus
+                continue;
+            }
+            if (!isset($colDefs[$col])) {
+                // column name spec is bogus
+                continue;
+            } elseif (in_array($col, $fields)) {
+                // if the sort column is also an output column, use it as-is
+                $q->setOrder($col.$order);
+            } else {
+                // otherwise if the column name is valid, use its expression
+                $q->setOrder($colDefs[$col].$order);
+            }
+        }
         // perform the query and return results
         return $this->db->prepare($q->getQuery(), $q->getTypes())->run($q->getValues());
     }
diff --git a/lib/REST/Fever/API.php b/lib/REST/Fever/API.php
index 47b4038..83c3be8 100644
--- a/lib/REST/Fever/API.php
+++ b/lib/REST/Fever/API.php
@@ -11,7 +11,7 @@ use JKingWeb\Arsse\Database;
 use JKingWeb\Arsse\User;
 use JKingWeb\Arsse\Service;
 use JKingWeb\Arsse\Context\Context;
-use JKingWeb\Arsse\Misc\ValueInfo;
+use JKingWeb\Arsse\Misc\ValueInfo as V;
 use JKingWeb\Arsse\Misc\Date;
 use JKingWeb\Arsse\AbstractException;
 use JKingWeb\Arsse\Db\ExceptionInput;
@@ -21,26 +21,54 @@ use JKingWeb\Arsse\REST\Exception405;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Message\ResponseInterface;
 use Zend\Diactoros\Response\JsonResponse;
+use Zend\Diactoros\Response\XmlResponse;
 use Zend\Diactoros\Response\EmptyResponse;
 
 class API extends \JKingWeb\Arsse\REST\AbstractHandler {
     const LEVEL = 3;
+    const GENERIC_ICON_TYPE = "image/png;base64";
+    const GENERIC_ICON_DATA = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAZdEVYdFNvZnR3YXJlAHBhaW50Lm5ldCA0LjAuMjHxIGmVAAAADUlEQVQYV2NgYGBgAAAABQABijPjAAAAAABJRU5ErkJggg==";
+
+    // GET parameters for which we only check presence: these will be converted to booleans
+    const PARAM_BOOL = ["groups", "feeds", "items", "favicons", "links", "unread_item_ids", "saved_item_ids"];
+    // GET parameters which contain meaningful values
+    const PARAM_GET = [
+        'api'       => V::T_STRING, // this parameter requires special handling
+        'page'      => V::T_INT, // parameter for hot links
+        'range'     => V::T_INT, // parameter for hot links
+        'offset'    => V::T_INT, // parameter for hot links
+        'since_id'  => V::T_INT,
+        'max_id'    => V::T_INT,
+        'with_ids'  => V::T_STRING,
+        'group_ids' => V::T_STRING, // undocumented parameter for 'items' lookup
+        'feed_ids'  => V::T_STRING, // undocumented parameter for 'items' lookup
+    ];
+    // POST parameters, all of which contain meaningful values
+    const PARAM_POST = [
+        'api_key'              => V::T_STRING,
+        'mark'                 => V::T_STRING,
+        'as'                   => V::T_STRING,
+        'id'                   => V::T_INT,
+        'before'               => V::T_DATE,
+        'unread_recently_read' => V::T_BOOL,
+    ];
 
     public function __construct() {
     }
 
     public function dispatch(ServerRequestInterface $req): ResponseInterface {
-        $inR = $req->getQueryParams() ?? [];
-        $inW = $req->getParsedBody() ?? [];
-        if (!array_key_exists("api", $inR)) {
+        $G = $this->normalizeInputGet($req->getQueryParams() ?? []);
+        $P = $this->normalizeInputPost($req->getParsedBody() ?? []);
+        if (!isset($G['api'])) {
             // the original would have shown the Fever UI in the absence of the "api" parameter, but we'll return 404
             return new EmptyResponse(404);
         }
-        $xml = $inR['api'] === "xml";
         switch ($req->getMethod()) {
             case "OPTIONS":
-                // do stuff
-                break;
+                return new EmptyResponse(204, [
+                    'Allow' => "POST",
+                    'Accept' => "application/x-www-form-urlencoded",
+                ]);
             case "POST":
                 if (strlen($req->getHeaderLine("Content-Type")) && $req->getHeaderLine("Content-Type") !== "application/x-www-form-urlencoded") {
                     return new EmptyResponse(415, ['Accept' => "application/x-www-form-urlencoded"]);
@@ -58,31 +86,87 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
                     return new EmptyResponse(401);
                 }
                 // produce a full response if authenticated or a basic response otherwise
-                if ($this->logIn(strtolower($inW['api_key'] ?? ""))) {
-                    $out = $this->processRequest($this->baseResponse(true), $inR, $inW);
+                if ($this->logIn(strtolower($P['api_key'] ?? ""))) {
+                    $out = $this->processRequest($this->baseResponse(true), $G, $P);
                 } else {
                     $out = $this->baseResponse(false);
                 }
                 // return the result, possibly formatted as XML
-                return $this->formatResponse($out, $xml);
-                break;
+                return $this->formatResponse($out, ($G['api'] === "xml"));
             default:
                 return new EmptyResponse(405, ['Allow' => "OPTIONS,POST"]);
         }
     }
 
+    protected function normalizeInputGet(array $data): array {
+        $out = [];
+        if (array_key_exists("api", $data)) {
+            // the "api" parameter must be handled specially as it a string, but null has special meaning
+            $data['api'] = $data['api'] ?? "json";
+        }
+        foreach (self::PARAM_BOOL as $p) {
+            // first handle all the boolean parameters
+            $out[$p] = array_key_exists($p, $data);
+        }
+        foreach (self::PARAM_GET as $p => $t) {
+            $out[$p] = V::normalize($data[$p] ?? null, $t | V::M_DROP, "unix");
+        }
+        return $out;
+    }
+
+    protected function normalizeInputPost(array $data): array {
+        $out = [];
+        foreach (self::PARAM_POST as $p => $t) {
+            $out[$p] = V::normalize($data[$p] ?? null, $t | V::M_DROP, "unix");
+        }
+        return $out;
+    }
+
     protected function processRequest(array $out, array $G, array $P): array {
-        if (array_key_exists("feeds", $G) || array_key_exists("groups", $G)) {
-            if (array_key_exists("groups", $G)) {
+        $listUnread = false;
+        $listSaved = false;
+        if ($P['unread_recently_read']) {
+            $this->setUnread();
+            $listUnread = true;
+        }
+        if ($P['mark'] && $P['as'] && is_int($P['id'])) {
+            // depending on which mark are being made,
+            // either an 'unread_item_ids' or a
+            // 'saved_item_ids' entry will be added later
+            $listSaved = $this->setMarks($P, $listUnread);
+        }
+        if ($G['feeds'] || $G['groups']) {
+            if ($G['groups']) {
                 $out['groups'] = $this->getGroups();
             }
-            if (array_key_exists("feeds", $G)) {
+            if ($G['feeds']) {
                 $out['feeds'] = $this->getFeeds();
             }
             $out['feeds_groups'] = $this->getRelationships();
         }
-        if (array_key_exists("favicons", $G)) {
-            # deal with favicons
+        if ($G['favicons']) {
+            // TODO: implement favicons properly
+            // we provide a single blank favicon for now
+            $out['favicons'] = [
+                [
+                    'id' => 0,
+                    'data' => self::GENERIC_ICON_TYPE.",".self::GENERIC_ICON_DATA,
+                ],
+            ];
+        }
+        if ($G['items']) {
+            $out['items'] = $this->getItems($G);
+            $out['total_items'] = Arsse::$db->articleCount(Arsse::$user->id);
+        }
+        if ($G['links']) {
+            // TODO: implement hot links
+            $out['links'] = [];
+        }
+        if ($G['unread_item_ids'] || $listUnread) {
+            $out['unread_item_ids'] = $this->getItemIds((new Context)->unread(true));
+        }
+        if ($G['saved_item_ids'] || $listSaved) {
+            $out['saved_item_ids'] = $this->getItemIds((new Context)->starred(true));
         }
         return $out;
     }
@@ -101,12 +185,49 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
 
     protected function formatResponse(array $data, bool $xml): ResponseInterface {
         if ($xml) {
-            throw \Exception("Not implemented yet");
+            $d = new \DOMDocument("1.0", "utf-8");
+            $d->appendChild($this->makeXMLAssoc($data, $d->createElement("response")));
+            return new XmlResponse($d->saveXML());
         } else {
             return new JsonResponse($data, 200, [], \JSON_UNESCAPED_SLASHES | \JSON_UNESCAPED_UNICODE);
         }
     }
 
+    protected function makeXMLAssoc(array $data, \DOMElement $p): \DOMElement {
+        $d = $p->ownerDocument;
+        foreach ($data as $k => $v) {
+            if (!is_array($v)) {
+                $p->appendChild($d->createElement($k, (string) $v));
+            } elseif (isset($v[0])) {
+                // this is a very simplistic check for an indexed array
+                // it would not pass muster in the face of generic data,
+                // but we'll assume our code produces only well-ordered 
+                // indexed arrays
+                $p->appendChild($this->makeXMLIndexed($v, $d->createElement($k), substr($k, 0, strlen($k) - 1)));
+            } else {
+                $p->appendChild($this->makeXMLAssoc($v, $d->createElement($k)));
+            }
+        }
+        return $p;
+    }
+
+    protected function makeXMLIndexed(array $data, \DOMElement $p, string $k): \DOMElement {
+        $d = $p->ownerDocument;
+        foreach ($data as $v) {
+            if (!is_array($v)) {
+                // this case is never encountered with Fever's output
+                $p->appendChild($d->createElement($k, (string) $v)); // @codeCoverageIgnore
+            } elseif (isset($v[0])) {
+                // this case is never encountered with Fever's output
+                $p->appendChild($this->makeXMLIndexed($v, $d->createElement($k), substr($k, 0, strlen($k) - 1))); // @codeCoverageIgnore
+            } else {
+                $p->appendChild($this->makeXMLAssoc($v, $d->createElement($k)));
+            }
+        }
+        return $p;
+
+    }
+
     protected function logIn(string $hash): bool {
         // if HTTP authentication was successful and sessions are not enforced, proceed unconditionally
         if (isset(Arsse::$user->id) && !Arsse::$conf->userSessionEnforced) {
@@ -123,6 +244,80 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
         return true;
     }
 
+    protected function setMarks(array $P, &$listUnread): bool {
+        $listSaved = false;
+        $c = new Context;
+        $id = $P['id'];
+        if ($P['before']) {
+            $c->notMarkedSince($P['before']);
+        }
+        switch ($P['mark']) {
+            case "item":
+                $c->article($id);
+                break;
+            case "group":
+                if ($id > 0) {
+                    // concrete groups
+                    $c->tag($id);
+                } elseif ($id < 0) {
+                    // group negative-one is the "Sparks" supergroup i.e. no feeds
+                    $c->not->folder(0);
+                } else {
+                    // group zero is the "Kindling" supergroup i.e. all feeds
+                    // nothing need to be done for this
+                }
+                break;
+            case "feed":
+                $c->subscription($id);
+                break;
+            default:
+                return $listSaved;
+        }
+        switch ($P['as']) {
+            case "read":
+                $data = ['read' => true];
+                $listUnread = true;
+                break;
+            case "unread":
+                // this option is undocumented, but valid
+                $data = ['read' => false];
+                $listUnread = true;
+                break;
+            case "saved":
+                $data = ['starred' => true];
+                $listSaved = true;
+                break;
+            case "unsaved":
+                $data = ['starred' => false];
+                $listSaved = true;
+                break;
+            default:
+                return $listSaved;
+        }
+        try {
+            Arsse::$db->articleMark(Arsse::$user->id, $data, $c);
+        } catch (ExceptionInput $e) {
+            // ignore any errors
+        }
+        return $listSaved;
+    }
+
+    protected function setUnread() {
+        $lastUnread = Arsse::$db->articleList(Arsse::$user->id, (new Context)->limit(1), ["marked_date"], ["marked_date desc"])->getValue();
+        if (!$lastUnread) {
+            // there are no articles
+            return;
+        }
+        // Fever takes the date of the last read article less fifteen seconds as a cut-off.
+        // We take the date of last mark (whether it be read, unread, saved, unsaved), which
+        // may not actually signify a mark, but we'll otherwise also count back fifteen seconds
+        $c = new Context;
+        $lastUnread = Date::normalize($lastUnread, "sql");
+        $since = Date::sub("PT15S", $lastUnread);
+        $c->unread(false)->markedSince($since);
+        Arsse::$db->articleMark(Arsse::$user->id, ['read' => false], $c); 
+    }
+
     protected function getRefreshTime() {
         return Date::transform(Arsse::$db->subscriptionRefreshed(Arsse::$user->id), "unix");
     }
@@ -132,7 +327,7 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
         foreach (arsse::$db->subscriptionList(Arsse::$user->id) as $sub) {
             $out[] = [
                 'id'                   => (int) $sub['id'],
-                'favicon_id'           => (int) ($sub['favicon'] ? $sub['feed'] : 0),
+                'favicon_id'           => 0, // TODO: implement favicons
                 'title'                => (string) $sub['title'],
                 'url'                  => $sub['url'],
                 'site_url'             => $sub['source'],
@@ -171,4 +366,50 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
         }
         return $out;
     }
+
+    protected function getItems(array $G): array {
+        $c = (new Context)->limit(50);
+        $reverse = false;
+        // handle the standard options
+        if ($G['with_ids']) {
+            $c->articles(explode(",", $G['with_ids']));
+        } elseif ($G['max_id']) {
+            $c->latestArticle($G['max_id'] - 1);
+            $reverse = true;
+        } elseif ($G['since_id']) {
+            $c->oldestArticle($G['since_id'] + 1);
+        }
+        // handle the undocumented options
+        if ($G['group_ids']) {
+            $c->tags(explode(",", $G['group_ids']));
+        }
+        if ($G['feed_ids']) {
+            $c->subscriptions(explode(",", $G['feed_ids']));
+        }
+        // get results
+        $out = [];
+        $order = $reverse ? "id desc" : "id";
+        foreach (Arsse::$db->articleList(Arsse::$user->id, $c, ["id", "subscription", "title", "author", "content", "url", "starred", "unread", "published_date"], [$order]) as $r) {
+            $out[] = [
+                'id'              => (int) $r['id'],
+                'feed_id'         => (int) $r['subscription'],
+                'title'           => (string) $r['title'],
+                'author'          => (string) $r['author'],
+                'html'            => (string) $r['content'],
+                'url'             => (string) $r['url'],
+                'is_saved'        => (int) $r['starred'],
+                'is_read'         => (int) !$r['unread'],
+                'created_on_time' => Date::transform($r['published_date'], "unix", "sql"),
+            ];
+        }
+        return $out;
+    }
+
+    protected function getItemIds(Context $c = null): string {
+        $out = [];
+        foreach (Arsse::$db->articleList(Arsse::$user->id, $c) as $r) {
+            $out[] = (int) $r['id'];
+        }
+        return implode(",", $out);
+    }
 }
diff --git a/lib/REST/NextCloudNews/V1_2.php b/lib/REST/NextCloudNews/V1_2.php
index 7f4301c..0df5032 100644
--- a/lib/REST/NextCloudNews/V1_2.php
+++ b/lib/REST/NextCloudNews/V1_2.php
@@ -521,14 +521,10 @@ class V1_2 extends \JKingWeb\Arsse\REST\AbstractHandler {
             $c->limit($data['batchSize']);
         }
         // set the order of returned items
-        if ($data['oldestFirst']) {
-            $c->reverse(false);
-        } else {
-            $c->reverse(true);
-        }
+        $reverse = !$data['oldestFirst'];
         // set the edition mark-off; the database uses an or-equal comparison for internal consistency, but the protocol does not, so we must adjust by one
         if ($data['offset'] > 0) {
-            if ($c->reverse) {
+            if ($reverse) {
                 $c->latestEdition($data['offset'] - 1);
             } else {
                 $c->oldestEdition($data['offset'] + 1);
@@ -579,7 +575,7 @@ class V1_2 extends \JKingWeb\Arsse\REST\AbstractHandler {
                 "starred",
                 "modified_date",
                 "fingerprint",
-            ]);
+            ], [$reverse ? "edition desc" : "edition"]);
         } catch (ExceptionInput $e) {
             // ID of subscription or folder is not valid
             return new EmptyResponse(422);
diff --git a/lib/REST/TinyTinyRSS/API.php b/lib/REST/TinyTinyRSS/API.php
index d29c0cf..045710c 100644
--- a/lib/REST/TinyTinyRSS/API.php
+++ b/lib/REST/TinyTinyRSS/API.php
@@ -8,11 +8,10 @@ namespace JKingWeb\Arsse\REST\TinyTinyRSS;
 
 use JKingWeb\Arsse\Feed;
 use JKingWeb\Arsse\Arsse;
-use JKingWeb\Arsse\Database;
-use JKingWeb\Arsse\User;
 use JKingWeb\Arsse\Service;
-use JKingWeb\Arsse\Misc\Date;
+use JKingWeb\Arsse\Database;
 use JKingWeb\Arsse\Context\Context;
+use JKingWeb\Arsse\Misc\Date;
 use JKingWeb\Arsse\Misc\ValueInfo;
 use JKingWeb\Arsse\AbstractException;
 use JKingWeb\Arsse\ExceptionType;
@@ -1439,7 +1438,7 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
                         // no context needed here
                         break;
                     case self::FEED_READ:
-                        $c->markedSince(Date::sub("PT24H"))->unread(false); // FIXME: this selects any recently touched article which is read, not necessarily a recently read one
+                        $c->markedSince(Date::sub("PT24H"))->unread(false); // FIXME: this selects any recently touched (read, starred, annotated) article which is read, not necessarily a recently read one
                         break;
                     default:
                         // any actual feed
@@ -1492,15 +1491,15 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
         switch ($data['order_by']) {
             case "date_reverse":
                 // sort oldest first
-                $c->reverse(false);
+                $order = ["edited_date"];
                 break;
             case "feed_dates":
                 // sort newest first
-                $c->reverse(true);
+                $order = ["edited_date desc"];
                 break;
             default:
-                // in TT-RSS the default sort order is unusual for some of the special feeds; we do not implement this
-                $c->reverse(true);
+                // sort most recently marked for special feeds, newest first otherwise
+                $order = (!$cat && ($id == self::FEED_READ || $id == self::FEED_STARRED)) ? ["marked_date desc"] : ["edited_date desc"];
                 break;
         }
         // set the limit and offset
@@ -1515,6 +1514,6 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
             $c->oldestArticle($data['since_id'] + 1);
         }
         // return results
-        return Arsse::$db->articleList(Arsse::$user->id, $c, $fields);
+        return Arsse::$db->articleList(Arsse::$user->id, $c, $fields, $order);
     }
 }
diff --git a/robo b/robo
index 0b3be08..f525941 100755
--- a/robo
+++ b/robo
@@ -5,7 +5,7 @@ shift
 
 ulimit -n 2048
 if [ "$1" = "clean" ]; then
-    "$base/vendor/bin/robo" "$roboCommand" $*
+    "$base/vendor/bin/robo" "$roboCommand" "$@"
 else
-    "$base/vendor/bin/robo" "$roboCommand" -- $*
+    "$base/vendor/bin/robo" "$roboCommand" -- "$@"
 fi
diff --git a/tests/cases/Database/SeriesArticle.php b/tests/cases/Database/SeriesArticle.php
index 2deaeb7..75fba45 100644
--- a/tests/cases/Database/SeriesArticle.php
+++ b/tests/cases/Database/SeriesArticle.php
@@ -10,6 +10,7 @@ use JKingWeb\Arsse\Database;
 use JKingWeb\Arsse\Arsse;
 use JKingWeb\Arsse\Context\Context;
 use JKingWeb\Arsse\Misc\Date;
+use JKingWeb\Arsse\Misc\ValueInfo;
 use Phake;
 
 trait SeriesArticle {
@@ -424,10 +425,15 @@ trait SeriesArticle {
         return [
             'Blank context' => [new Context, [1,2,3,4,5,6,7,8,19,20]],
             'Folder tree' => [(new Context)->folder(1), [5,6,7,8]],
+            'Entire folder tree' => [(new Context)->folder(0), [1,2,3,4,5,6,7,8,19,20]],
             'Leaf folder' => [(new Context)->folder(6), [7,8]],
-            'Root folder only' => [(new Context)->folderShallow(0), [1,2,3,4]],
+            'Multiple folder trees' => [(new Context)->folders([1,5]), [5,6,7,8,19,20]],
+            'Multiple folder trees including root' => [(new Context)->folders([0,1,5]), [1,2,3,4,5,6,7,8,19,20]],
             'Shallow folder' => [(new Context)->folderShallow(1), [5,6]],
+            'Root folder only' => [(new Context)->folderShallow(0), [1,2,3,4]],
+            'Multiple shallow folders' => [(new Context)->foldersShallow([1,6]), [5,6,7,8]],
             'Subscription' => [(new Context)->subscription(5), [19,20]],
+            'Multiple subscriptions' => [(new Context)->subscriptions([4,5]), [7,8,19,20]],
             'Unread' => [(new Context)->subscription(5)->unread(true), [20]],
             'Read' => [(new Context)->subscription(5)->unread(false), [19]],
             'Starred' => [(new Context)->starred(true), [1,20]],
@@ -455,11 +461,12 @@ trait SeriesArticle {
             'Marked or labelled between 2000 and 2015' => [(new Context)->markedSince("2000-01-01T00:00:00Z")->notMarkedSince("2015-12-31T23:59:59Z"), [1,2,3,4,5,6,7,8,20]],
             'Marked or labelled in 2010' => [(new Context)->markedSince("2010-01-01T00:00:00Z")->notMarkedSince("2010-12-31T23:59:59Z"), [2,4,6,20]],
             'Paged results' => [(new Context)->limit(2)->oldestEdition(4), [4,5]],
-            'Reversed paged results' => [(new Context)->limit(2)->latestEdition(7)->reverse(true), [7,6]],
             'With label ID 1' => [(new Context)->label(1), [1,19]],
             'With label ID 2' => [(new Context)->label(2), [1,5,20]],
+            'With label ID 1 or 2' => [(new Context)->labels([1,2]), [1,5,19,20]],
             'With label "Interesting"' => [(new Context)->labelName("Interesting"), [1,19]],
             'With label "Fascinating"' => [(new Context)->labelName("Fascinating"), [1,5,20]],
+            'With label "Interesting" or "Fascinating"' => [(new Context)->labelNames(["Interesting","Fascinating"]), [1,5,19,20]],
             'Article ID 20' => [(new Context)->article(20), [20]],
             'Edition ID 1001' => [(new Context)->edition(1001), [20]],
             'Multiple articles' => [(new Context)->articles([1,20,50]), [1,20]],
@@ -494,12 +501,19 @@ trait SeriesArticle {
             'Search 501 terms' => [(new Context)->searchTerms(array_merge(range(1, 500), [str_repeat("a", 1000)])), []],
             'With tag ID 1' => [(new Context)->tag(1), [5,6,7,8]],
             'With tag ID 5' => [(new Context)->tag(5), [7,8,19,20]],
+            'With tag ID 1 or 5' => [(new Context)->tags([1,5]), [5,6,7,8,19,20]],
             'With tag "Technology"' => [(new Context)->tagName("Technology"), [5,6,7,8]],
             'With tag "Politics"' => [(new Context)->tagName("Politics"), [7,8,19,20]],
+            'With tag "Technology" or "Politics"' => [(new Context)->tagNames(["Technology","Politics"]), [5,6,7,8,19,20]],
             'Excluding tag ID 1' => [(new Context)->not->tag(1), [1,2,3,4,19,20]],
             'Excluding tag ID 5' => [(new Context)->not->tag(5), [1,2,3,4,5,6]],
             'Excluding tag "Technology"' => [(new Context)->not->tagName("Technology"), [1,2,3,4,19,20]],
             'Excluding tag "Politics"' => [(new Context)->not->tagName("Politics"), [1,2,3,4,5,6]],
+            'Excluding tags ID 1 and 5' => [(new Context)->not->tags([1,5]), [1,2,3,4]],
+            'Excluding tags "Technology" and "Politics"' => [(new Context)->not->tagNames(["Technology","Politics"]), [1,2,3,4]],
+            'Excluding entire folder tree' => [(new Context)->not->folder(0), []],
+            'Excluding multiple folder trees' => [(new Context)->not->folders([1,5]), [1,2,3,4]],
+            'Excluding multiple folder trees including root' => [(new Context)->not->folders([0,1,5]), []],
         ];
     }
 
@@ -563,6 +577,25 @@ trait SeriesArticle {
         $this->assertEquals($this->fields, $test);
     }
 
+    /** @dataProvider provideOrderedLists */
+    public function testListArticlesCheckingOrder(array $sortCols, array $exp) {
+        $act = ValueInfo::normalize(array_column(iterator_to_array(Arsse::$db->articleList("john.doe@example.com", null, ["id"], $sortCols)), "id"), ValueInfo::T_INT | ValueInfo::M_ARRAY);
+        $this->assertSame($exp, $act);
+    }
+
+    public function provideOrderedLists() {
+        return [
+            [["id"], [1,2,3,4,5,6,7,8,19,20]],
+            [["id asc"], [1,2,3,4,5,6,7,8,19,20]],
+            [["id desc"], [20,19,8,7,6,5,4,3,2,1]],
+            [["edition"], [1,2,3,4,5,6,7,8,19,20]],
+            [["edition asc"], [1,2,3,4,5,6,7,8,19,20]],
+            [["edition desc"], [20,19,8,7,6,5,4,3,2,1]],
+            [["id", "edition desk"], [1,2,3,4,5,6,7,8,19,20]],
+            [["id", "editio"], [1,2,3,4,5,6,7,8,19,20]],
+        ];
+    }
+
     public function testListArticlesWithoutAuthority() {
         Phake::when(Arsse::$user)->authorize->thenReturn(false);
         $this->assertException("notAuthorized", "User", "ExceptionAuthz");
@@ -783,11 +816,6 @@ trait SeriesArticle {
         $this->compareExpectations(static::$drv, $state);
     }
 
-    public function testMarkTooFewMultipleArticles() {
-        $this->assertException("tooShort", "Db", "ExceptionInput");
-        Arsse::$db->articleMark($this->user, ['read'=>false,'starred'=>true], (new Context)->articles([]));
-    }
-
     public function testMarkTooManyMultipleArticles() {
         $this->assertSame(7, Arsse::$db->articleMark($this->user, ['read'=>false,'starred'=>true], (new Context)->articles(range(1, Database::LIMIT_SET_SIZE * 3))));
     }
@@ -854,11 +882,6 @@ trait SeriesArticle {
         $this->compareExpectations(static::$drv, $state);
     }
 
-    public function testMarkTooFewMultipleEditions() {
-        $this->assertException("tooShort", "Db", "ExceptionInput");
-        Arsse::$db->articleMark($this->user, ['read'=>false,'starred'=>true], (new Context)->editions([]));
-    }
-
     public function testMarkTooManyMultipleEditions() {
         $this->assertSame(7, Arsse::$db->articleMark($this->user, ['read'=>false,'starred'=>true], (new Context)->editions(range(1, 51))));
     }
@@ -1030,13 +1053,20 @@ trait SeriesArticle {
         Arsse::$db->articleCategoriesGet($this->user, 19);
     }
 
-    public function testSearchTooFewTerms() {
+    /** @dataProvider provideArrayContextOptions */
+    public function testUseTooFewValuesInArrayContext(string $option) {
         $this->assertException("tooShort", "Db", "ExceptionInput");
-        Arsse::$db->articleList($this->user, (new Context)->searchTerms([]));
+        Arsse::$db->articleList($this->user, (new Context)->$option([]));
     }
 
-    public function testSearchTooFewTermsInNote() {
-        $this->assertException("tooShort", "Db", "ExceptionInput");
-        Arsse::$db->articleList($this->user, (new Context)->annotationTerms([]));
+    public function provideArrayContextOptions() {
+        foreach ([
+            "articles", "editions",
+            "subscriptions", "foldersShallow", //"folders",
+            "tags", "tagNames", "labels", "labelNames",
+            "searchTerms", "authorTerms", "annotationTerms",
+        ] as $method) {
+            yield [$method];
+        }
     }
 }
diff --git a/tests/cases/Misc/TestContext.php b/tests/cases/Misc/TestContext.php
index e85d58e..f32f11e 100644
--- a/tests/cases/Misc/TestContext.php
+++ b/tests/cases/Misc/TestContext.php
@@ -29,10 +29,15 @@ class TestContext extends \JKingWeb\Arsse\Test\AbstractTest {
             'limit' => 10,
             'offset' => 5,
             'folder' => 42,
+            'folders' => [12,22],
             'folderShallow' => 42,
+            'foldersShallow' => [0,1],
             'tag' => 44,
+            'tags' => [44, 2112],
             'tagName' => "XLIV",
+            'tagNames' => ["XLIV", "MMCXII"],
             'subscription' => 2112,
+            'subscriptions' => [44, 2112],
             'article' => 255,
             'edition' => 65535,
             'latestArticle' => 47,
@@ -48,7 +53,9 @@ class TestContext extends \JKingWeb\Arsse\Test\AbstractTest {
             'editions' => [1,2],
             'articles' => [1,2],
             'label' => 2112,
+            'labels' => [2112, 1984],
             'labelName' => "Rush",
+            'labelNames' => ["Rush", "Orwell"],
             'labelled' => true,
             'annotated' => true,
             'searchTerms' => ["foo", "bar"],
@@ -79,9 +86,19 @@ class TestContext extends \JKingWeb\Arsse\Test\AbstractTest {
     }
 
     public function testCleanIdArrayValues() {
-        $methods = ["articles", "editions"];
-        $in = [1, "2", 3.5, 3.0, "ook", 0, -20, true, false, null, new \DateTime(), -1.0];
-        $out = [1,2, 3];
+        $methods = ["articles", "editions", "tags", "labels", "subscriptions"];
+        $in = [1, "2", 3.5, 4.0, 4, "ook", 0, -20, true, false, null, new \DateTime(), -1.0];
+        $out = [1, 2, 4];
+        $c = new Context;
+        foreach ($methods as $method) {
+            $this->assertSame($out, $c->$method($in)->$method, "Context method $method did not return the expected results");
+        }
+    }
+
+    public function testCleanFolderIdArrayValues() {
+        $methods = ["folders", "foldersShallow"];
+        $in = [1, "2", 3.5, 4.0, 4, "ook", 0, -20, true, false, null, new \DateTime(), -1.0];
+        $out = [1, 2, 4, 0];
         $c = new Context;
         foreach ($methods as $method) {
             $this->assertSame($out, $c->$method($in)->$method, "Context method $method did not return the expected results");
@@ -89,7 +106,7 @@ class TestContext extends \JKingWeb\Arsse\Test\AbstractTest {
     }
 
     public function testCleanStringArrayValues() {
-        $methods = ["searchTerms", "annotationTerms", "titleTerms", "authorTerms"];
+        $methods = ["searchTerms", "annotationTerms", "titleTerms", "authorTerms", "tagNames", "labelNames"];
         $now = new \DateTime;
         $in = [1, 3.0, "ook", 0, true, false, null, $now, ""];
         $out = ["1", "3", "ook", "0", valueInfo::normalize($now, ValueInfo::T_STRING)];
diff --git a/tests/cases/REST/Fever/TestAPI.php b/tests/cases/REST/Fever/TestAPI.php
index 1986db0..3393dde 100644
--- a/tests/cases/REST/Fever/TestAPI.php
+++ b/tests/cases/REST/Fever/TestAPI.php
@@ -7,37 +7,153 @@ declare(strict_types=1);
 namespace JKingWeb\Arsse\TestCase\REST\Fever;
 
 use JKingWeb\Arsse\Arsse;
-use JKingWeb\Arsse\Conf;
 use JKingWeb\Arsse\User;
 use JKingWeb\Arsse\Database;
-use JKingWeb\Arsse\Service;
-use JKingWeb\Arsse\REST\Request;
 use JKingWeb\Arsse\Test\Result;
-use JKingWeb\Arsse\Misc\Date;
 use JKingWeb\Arsse\Context\Context;
 use JKingWeb\Arsse\Db\ExceptionInput;
-use JKingWeb\Arsse\User\Exception as UserException;
 use JKingWeb\Arsse\Db\Transaction;
 use JKingWeb\Arsse\REST\Fever\API;
 use Psr\Http\Message\ResponseInterface;
 use Zend\Diactoros\ServerRequest;
 use Zend\Diactoros\Response\JsonResponse;
+use Zend\Diactoros\Response\XmlResponse;
 use Zend\Diactoros\Response\EmptyResponse;
 
 /** @covers \JKingWeb\Arsse\REST\Fever\API<extended> */
 class TestAPI extends \JKingWeb\Arsse\Test\AbstractTest {
+    /** @var \JKingWeb\Arsse\REST\Fever\API */
+    protected $h;
+
+    protected $articles = [
+        'db' => [
+            [
+                'id' => 101,
+                'url' => 'http://example.com/1',
+                'title' => 'Article title 1',
+                'author' => '',
+                'content' => '<p>Article content 1</p>',
+                'published_date' => '2000-01-01 00:00:00',
+                'unread' => 1,
+                'starred' => 0,
+                'subscription' => 8,
+            ],
+            [
+                'id' => 102,
+                'url' => 'http://example.com/2',
+                'title' => 'Article title 2',
+                'author' => '',
+                'content' => '<p>Article content 2</p>',
+                'published_date' => '2000-01-02 00:00:00',
+                'unread' => 0,
+                'starred' => 0,
+                'subscription' => 8,
+            ],
+            [
+                'id' => 103,
+                'url' => 'http://example.com/3',
+                'title' => 'Article title 3',
+                'author' => '',
+                'content' => '<p>Article content 3</p>',
+                'published_date' => '2000-01-03 00:00:00',
+                'unread' => 1,
+                'starred' => 1,
+                'subscription' => 9,
+            ],
+            [
+                'id' => 104,
+                'url' => 'http://example.com/4',
+                'title' => 'Article title 4',
+                'author' => '',
+                'content' => '<p>Article content 4</p>',
+                'published_date' => '2000-01-04 00:00:00',
+                'unread' => 0,
+                'starred' => 1,
+                'subscription' => 9,
+            ],
+            [
+                'id' => 105,
+                'url' => 'http://example.com/5',
+                'title' => 'Article title 5',
+                'author' => '',
+                'content' => '<p>Article content 5</p>',
+                'published_date' => '2000-01-05 00:00:00',
+                'unread' => 1,
+                'starred' => 0,
+                'subscription' => 10,
+            ],
+        ],
+        'rest' => [
+            [
+                'id' => 101,
+                'feed_id' => 8,
+                'title' => 'Article title 1',
+                'author' => '',
+                'html' => '<p>Article content 1</p>',
+                'url' => 'http://example.com/1',
+                'is_saved' => 0,
+                'is_read' => 0,
+                'created_on_time' => 946684800,
+            ],
+            [
+                'id' => 102,
+                'feed_id' => 8,
+                'title' => 'Article title 2',
+                'author' => '',
+                'html' => '<p>Article content 2</p>',
+                'url' => 'http://example.com/2',
+                'is_saved' => 0,
+                'is_read' => 1,
+                'created_on_time' => 946771200,
+            ],
+            [
+                'id' => 103,
+                'feed_id' => 9,
+                'title' => 'Article title 3',
+                'author' => '',
+                'html' => '<p>Article content 3</p>',
+                'url' => 'http://example.com/3',
+                'is_saved' => 1,
+                'is_read' => 0,
+                'created_on_time' => 946857600,
+            ],
+            [
+                'id' => 104,
+                'feed_id' => 9,
+                'title' => 'Article title 4',
+                'author' => '',
+                'html' => '<p>Article content 4</p>',
+                'url' => 'http://example.com/4',
+                'is_saved' => 1,
+                'is_read' => 1,
+                'created_on_time' => 946944000,
+            ],
+            [
+                'id' => 105,
+                'feed_id' => 10,
+                'title' => 'Article title 5',
+                'author' => '',
+                'html' => '<p>Article content 5</p>',
+                'url' => 'http://example.com/5',
+                'is_saved' => 0,
+                'is_read' => 0,
+                'created_on_time' => 947030400,
+            ],
+        ],
+    ];
     protected function v($value) {
         return $value;
     }
 
-    protected function req($dataGet, $dataPost = "", string $method = "POST", string $type = null, string $url = "", string $user = null): ResponseInterface {
+    protected function req($dataGet, $dataPost = "", string $method = "POST", string $type = null, string $url = "", string $user = null): ServerRequest {
         $url = "/fever/".$url;
+        $type = $type ?? "application/x-www-form-urlencoded";
         $server = [
             'REQUEST_METHOD'    => $method,
             'REQUEST_URI'       => $url,
-            'HTTP_CONTENT_TYPE' => $type ?? "application/x-www-form-urlencoded",
+            'HTTP_CONTENT_TYPE' => $type,
         ];
-        $req = new ServerRequest($server, [], $url, $method, "php://memory");
+        $req = new ServerRequest($server, [], $url, $method, "php://memory", ['Content-Type' => $type]);
         if (!is_array($dataGet)) {
             parse_str($dataGet, $dataGet);
         }
@@ -45,9 +161,8 @@ class TestAPI extends \JKingWeb\Arsse\Test\AbstractTest {
         if (is_array($dataPost)) {
             $req = $req->withParsedBody($dataPost);
         } else {
-            $body = $req->getBody();
-            $body->write($dataPost);
-            $req = $req->withBody($body);
+            parse_str($dataPost, $arr);
+            $req = $req->withParsedBody($arr);
         }
         if (isset($user)) {
             if (strlen($user)) {
@@ -56,7 +171,7 @@ class TestAPI extends \JKingWeb\Arsse\Test\AbstractTest {
                 $req = $req->withAttribute("authenticationFailed", true);
             }
         }
-        return $this->h->dispatch($req);
+        return $req;
     }
 
     public function setUp() {
@@ -95,7 +210,7 @@ class TestAPI extends \JKingWeb\Arsse\Test\AbstractTest {
         \Phake::when($this->h)->processRequest->thenReturnCallback(function($out, $G, $P) {
             return $out;
         });
-        $act = $this->req($dataGet, $dataPost, "POST", null, "", $httpUser);
+        $act = $this->h->dispatch($this->req($dataGet, $dataPost, "POST", null, "", $httpUser));
         $this->assertMessage($exp, $act);
     }
 
@@ -174,7 +289,7 @@ class TestAPI extends \JKingWeb\Arsse\Test\AbstractTest {
                 ['group_id' => 2, 'feed_ids' => "1,3"],
             ],
         ]);
-        $act = $this->req("api&groups");
+        $act = $this->h->dispatch($this->req("api&groups"));
         $this->assertMessage($exp, $act);
     }
 
@@ -192,16 +307,208 @@ class TestAPI extends \JKingWeb\Arsse\Test\AbstractTest {
         ]));
         $exp = new JsonResponse([
             'feeds' => [
-                ['id' => 1, 'favicon_id' => 5, 'title' => "Ankh-Morpork News", 'url' => "http://example.com/feed", 'site_url' => "http://example.com/", 'is_spark' => 0, 'last_updated_on_time' => strtotime("2019-01-01T21:12:00Z")],
+                ['id' => 1, 'favicon_id' => 0, 'title' => "Ankh-Morpork News", 'url' => "http://example.com/feed", 'site_url' => "http://example.com/", 'is_spark' => 0, 'last_updated_on_time' => strtotime("2019-01-01T21:12:00Z")],
                 ['id' => 2, 'favicon_id' => 0, 'title' => "Ook, Ook Eek Ook!", 'url' => "http://example.net/feed", 'site_url' => "http://example.net/", 'is_spark' => 0, 'last_updated_on_time' => strtotime("1988-06-24T12:21:00Z")],
-                ['id' => 3, 'favicon_id' => 1, 'title' => "The Last Soul",     'url' => "http://example.org/feed", 'site_url' => "http://example.org/", 'is_spark' => 0, 'last_updated_on_time' => strtotime("1991-08-12T03:22:00Z")],
+                ['id' => 3, 'favicon_id' => 0, 'title' => "The Last Soul",     'url' => "http://example.org/feed", 'site_url' => "http://example.org/", 'is_spark' => 0, 'last_updated_on_time' => strtotime("1991-08-12T03:22:00Z")],
             ],
             'feeds_groups' => [
                 ['group_id' => 1, 'feed_ids' => "1,2"],
                 ['group_id' => 2, 'feed_ids' => "1,3"],
             ],
         ]);
-        $act = $this->req("api&feeds");
+        $act = $this->h->dispatch($this->req("api&feeds"));
+        $this->assertMessage($exp, $act);
+    }       
+
+    /** @dataProvider provideItemListContexts */
+    public function testListItems(string $url, Context $c, bool $desc) {
+        $fields = ["id", "subscription", "title", "author", "content", "url", "starred", "unread", "published_date"];
+        $order = [$desc ? "id desc" : "id"];
+        \Phake::when(Arsse::$db)->articleList->thenReturn(new Result($this->articles['db']));
+        \Phake::when(Arsse::$db)->articleCount(Arsse::$user->id)->thenReturn(1024);
+        $exp = new JsonResponse([
+            'items' => $this->articles['rest'],
+            'total_items' => 1024,
+        ]);
+        $act = $this->h->dispatch($this->req("api&$url"));
+        $this->assertMessage($exp, $act);
+        \Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, $c, $fields, $order);
+    }
+
+    public function provideItemListContexts() {
+        $c = (new Context)->limit(50);
+        return [
+            ["items", (clone $c), false],
+            ["items&group_ids=1,2,3,4", (clone $c)->tags([1,2,3,4]), false],
+            ["items&feed_ids=1,2,3,4", (clone $c)->subscriptions([1,2,3,4]), false],
+            ["items&with_ids=1,2,3,4", (clone $c)->articles([1,2,3,4]), false],
+            ["items&since_id=1", (clone $c)->oldestArticle(2), false],
+            ["items&max_id=2", (clone $c)->latestArticle(1), true],
+            ["items&with_ids=1,2,3,4&max_id=6", (clone $c)->articles([1,2,3,4]), false],
+            ["items&with_ids=1,2,3,4&since_id=6", (clone $c)->articles([1,2,3,4]), false],
+            ["items&max_id=3&since_id=6", (clone $c)->latestArticle(2), true],
+            ["items&feed_ids=1,2,3,4&since_id=6", (clone $c)->subscriptions([1,2,3,4])->oldestArticle(7), false],
+        ];
+    }
+
+    public function testListItemIds() {
+        $saved = [['id' => 1],['id' => 2],['id' => 3]];
+        $unread = [['id' => 4],['id' => 5],['id' => 6]];
+        \Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->starred(true))->thenReturn(new Result($saved));
+        \Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->unread(true))->thenReturn(new Result($unread));
+        $exp = new JsonResponse([
+            'saved_item_ids' => "1,2,3"
+        ]);
+        $this->assertMessage($exp, $this->h->dispatch($this->req("api&saved_item_ids")));
+        $exp = new JsonResponse([
+            'unread_item_ids' => "4,5,6"
+        ]);
+        $this->assertMessage($exp, $this->h->dispatch($this->req("api&unread_item_ids")));
+    }
+
+    public function testListHotLinks() {
+        // hot links are not actually implemented, so an empty array should be all we get
+        $exp = new JsonResponse([
+            'links' => []
+        ]);
+        $this->assertMessage($exp, $this->h->dispatch($this->req("api&links")));
+    }
+
+    /** @dataProvider provideMarkingContexts */
+    public function testSetMarks(string $post, Context $c, array $data, array $out) {
+        $saved = [['id' => 1],['id' => 2],['id' => 3]];
+        $unread = [['id' => 4],['id' => 5],['id' => 6]];
+        \Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->starred(true))->thenReturn(new Result($saved));
+        \Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->unread(true))->thenReturn(new Result($unread));
+        \Phake::when(Arsse::$db)->articleMark->thenReturn(0);
+        \Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $this->anything(), (new Context)->article(2112))->thenThrow(new \JKingWeb\Arsse\Db\ExceptionInput("subjectMissing"));
+        $exp = new JsonResponse($out);
+        $act = $this->h->dispatch($this->req("api", $post));
+        $this->assertMessage($exp, $act);
+        if ($c && $data) {
+            \Phake::verify(Arsse::$db)->articleMark(Arsse::$user->id, $data, $c);
+        } else {
+            \Phake::verify(Arsse::$db, \Phake::times(0))->articleMark;
+        }
+    }
+
+    public function provideMarkingContexts() {
+        $markRead = ['read' => true];
+        $markUnread = ['read' => false];
+        $markSaved = ['starred' => true];
+        $markUnsaved = ['starred' => false];
+        $listSaved = ['saved_item_ids' => "1,2,3"];
+        $listUnread = ['unread_item_ids' => "4,5,6"];
+        return [
+            ["mark=item&as=read&id=5", (new Context)->article(5), $markRead, $listUnread],
+            ["mark=item&as=unread&id=42", (new Context)->article(42), $markUnread, $listUnread],
+            ["mark=item&as=read&id=2112", (new Context)->article(2112), $markRead, $listUnread], // article doesn't exist
+            ["mark=item&as=saved&id=5", (new Context)->article(5), $markSaved, $listSaved],
+            ["mark=item&as=unsaved&id=42", (new Context)->article(42), $markUnsaved, $listSaved],
+            ["mark=feed&as=read&id=5", (new Context)->subscription(5), $markRead, $listUnread],
+            ["mark=feed&as=unread&id=42", (new Context)->subscription(42), $markUnread, $listUnread],
+            ["mark=feed&as=saved&id=5", (new Context)->subscription(5), $markSaved, $listSaved],
+            ["mark=feed&as=unsaved&id=42", (new Context)->subscription(42), $markUnsaved, $listSaved],
+            ["mark=group&as=read&id=5", (new Context)->tag(5), $markRead, $listUnread],
+            ["mark=group&as=unread&id=42", (new Context)->tag(42), $markUnread, $listUnread],
+            ["mark=group&as=saved&id=5", (new Context)->tag(5), $markSaved, $listSaved],
+            ["mark=group&as=unsaved&id=42", (new Context)->tag(42), $markUnsaved, $listSaved],
+            ["mark=item&as=invalid&id=42", new Context, [], []],
+            ["mark=invalid&as=unread&id=42", new Context, [], []],
+            ["mark=group&as=read&id=0", (new Context), $markRead, $listUnread],
+            ["mark=group&as=unread&id=0", (new Context), $markUnread, $listUnread],
+            ["mark=group&as=saved&id=0", (new Context), $markSaved, $listSaved],
+            ["mark=group&as=unsaved&id=0", (new Context), $markUnsaved, $listSaved],
+            ["mark=group&as=read&id=-1", (new Context)->not->folder(0), $markRead, $listUnread],
+            ["mark=group&as=unread&id=-1", (new Context)->not->folder(0), $markUnread, $listUnread],
+            ["mark=group&as=saved&id=-1", (new Context)->not->folder(0), $markSaved, $listSaved],
+            ["mark=group&as=unsaved&id=-1", (new Context)->not->folder(0), $markUnsaved, $listSaved],
+            ["mark=group&as=read&id=-1&before=946684800", (new Context)->not->folder(0)->notMarkedSince("2000-01-01T00:00:00Z"), $markRead, $listUnread],
+            ["mark=item&as=unread", new Context, [], []],
+            ["mark=item&id=6", new Context, [], []],
+            ["as=unread&id=6", new Context, [], []],
+        ];
+    }
+
+    /** @dataProvider provideInvalidRequests */
+    public function testSendInvalidRequests(ServerRequest $req, ResponseInterface $exp) {
+        $this->assertMessage($exp, $this->h->dispatch($req));
+    }
+
+    public function provideInvalidRequests() {
+        return [
+            'Not an API request' => [$this->req(""), new EmptyResponse(404)],
+            'Wrong method'       => [$this->req("api", "", "GET"), new EmptyResponse(405, ['Allow' => "OPTIONS,POST"])],
+            'Wrong content type' => [$this->req("api", "", "POST", "application/json"), new EmptyResponse(415, ['Accept' => "application/x-www-form-urlencoded"])],
+        ];
+    }
+
+    public function testMakeABaseQuery() {
+        $this->h = \Phake::partialMock(API::class);
+        \Phake::when($this->h)->logIn->thenReturn(true);
+        \Phake::when(Arsse::$db)->subscriptionRefreshed(Arsse::$user->id)->thenReturn(new \DateTimeImmutable("2000-01-01T00:00:00Z"));
+        $exp = new JsonResponse([
+            'api_version' => API::LEVEL,
+            'auth' => 1,
+            'last_refreshed_on_time' => 946684800,
+        ]);
+        $act = $this->h->dispatch($this->req("api"));
+        $this->assertMessage($exp, $act);
+        \Phake::when(Arsse::$db)->subscriptionRefreshed(Arsse::$user->id)->thenReturn(null); // no subscriptions
+        $exp = new JsonResponse([
+            'api_version' => API::LEVEL,
+            'auth' => 1,
+            'last_refreshed_on_time' => null,
+        ]);
+        $act = $this->h->dispatch($this->req("api"));
+        $this->assertMessage($exp, $act);
+        \Phake::when($this->h)->logIn->thenReturn(false);
+        $exp = new JsonResponse([
+            'api_version' => API::LEVEL,
+            'auth' => 0,
+        ]);
+        $act = $this->h->dispatch($this->req("api"));
+        $this->assertMessage($exp, $act);
+    }
+
+    public function testUndoReadMarks() {
+        $unread = [['id' => 4],['id' => 5],['id' => 6]];
+        $out = ['unread_item_ids' => "4,5,6"];
+        \Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->limit(1), ["marked_date"], ["marked_date desc"])->thenReturn(new Result([['marked_date' => "2000-01-01 00:00:00"]]));
+        \Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->unread(true))->thenReturn(new Result($unread));
+        \Phake::when(Arsse::$db)->articleMark->thenReturn(0);
+        $exp = new JsonResponse($out);
+        $act = $this->h->dispatch($this->req("api", ['unread_recently_read' => 1]));
+        $this->assertMessage($exp, $act);
+        \Phake::verify(Arsse::$db)->articleMark(Arsse::$user->id, ['read' => false], (new Context)->unread(false)->markedSince("1999-12-31T23:59:45Z"));
+        \Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->limit(1), ["marked_date"], ["marked_date desc"])->thenReturn(new Result([]));
+        $act = $this->h->dispatch($this->req("api", ['unread_recently_read' => 1]));
+        $this->assertMessage($exp, $act);
+        \Phake::verify(Arsse::$db)->articleMark; // only called one time, above
+    }
+
+    public function testOutputToXml() {
+        \Phake::when($this->h)->processRequest->thenReturn([
+            'items' => $this->articles['rest'],
+            'total_items' => 1024,
+        ]);
+        $exp = new XmlResponse("<response><items><item><id>101</id><feed_id>8</feed_id><title>Article title 1</title><author></author><html>&lt;p&gt;Article content 1&lt;/p&gt;</html><url>http://example.com/1</url><is_saved>0</is_saved><is_read>0</is_read><created_on_time>946684800</created_on_time></item><item><id>102</id><feed_id>8</feed_id><title>Article title 2</title><author></author><html>&lt;p&gt;Article content 2&lt;/p&gt;</html><url>http://example.com/2</url><is_saved>0</is_saved><is_read>1</is_read><created_on_time>946771200</created_on_time></item><item><id>103</id><feed_id>9</feed_id><title>Article title 3</title><author></author><html>&lt;p&gt;Article content 3&lt;/p&gt;</html><url>http://example.com/3</url><is_saved>1</is_saved><is_read>0</is_read><created_on_time>946857600</created_on_time></item><item><id>104</id><feed_id>9</feed_id><title>Article title 4</title><author></author><html>&lt;p&gt;Article content 4&lt;/p&gt;</html><url>http://example.com/4</url><is_saved>1</is_saved><is_read>1</is_read><created_on_time>946944000</created_on_time></item><item><id>105</id><feed_id>10</feed_id><title>Article title 5</title><author></author><html>&lt;p&gt;Article content 5&lt;/p&gt;</html><url>http://example.com/5</url><is_saved>0</is_saved><is_read>0</is_read><created_on_time>947030400</created_on_time></item></items><total_items>1024</total_items></response>");
+        $act = $this->h->dispatch($this->req("api=xml"));
+        $this->assertMessage($exp, $act);
+    }
+
+    public function testListFeedIcons() {
+        $act = $this->h->dispatch($this->req("api&favicons"));
+        $exp = new JsonResponse(['favicons' => [['id' => 0, 'data' => API::GENERIC_ICON_TYPE.",".API::GENERIC_ICON_DATA]]]);
+        $this->assertMessage($exp, $act);        
+    }
+
+    public function testAnswerOptionsRequest() {
+        $act = $this->h->dispatch($this->req("api", "", "OPTIONS"));
+        $exp = new EmptyResponse(204, [
+            'Allow' => "POST",
+            'Accept' => "application/x-www-form-urlencoded",
+        ]);
         $this->assertMessage($exp, $act);
     }
 }
diff --git a/tests/cases/REST/NextCloudNews/TestV1_2.php b/tests/cases/REST/NextCloudNews/TestV1_2.php
index 664db4e..52291cb 100644
--- a/tests/cases/REST/NextCloudNews/TestV1_2.php
+++ b/tests/cases/REST/NextCloudNews/TestV1_2.php
@@ -734,11 +734,11 @@ class TestV1_2 extends \JKingWeb\Arsse\Test\AbstractTest {
             ['lastModified' => $t->getTimestamp()],
             ['oldestFirst' => false, 'batchSize' => 5, 'offset' => 0], // offset=0 should not set the latestEdition context
         ];
-        Phake::when(Arsse::$db)->articleList(Arsse::$user->id, $this->anything(), $this->anything())->thenReturn(new Result($this->v($this->articles['db'])));
-        Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->subscription(42), $this->anything())->thenThrow(new ExceptionInput("idMissing"));
-        Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->folder(2112), $this->anything())->thenThrow(new ExceptionInput("idMissing"));
-        Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->subscription(-1), $this->anything())->thenThrow(new ExceptionInput("typeViolation"));
-        Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->folder(-1), $this->anything())->thenThrow(new ExceptionInput("typeViolation"));
+        Phake::when(Arsse::$db)->articleList->thenReturn(new Result($this->v($this->articles['db'])));
+        Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->subscription(42), $this->anything(), ["edition desc"])->thenThrow(new ExceptionInput("idMissing"));
+        Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->folder(2112), $this->anything(), ["edition desc"])->thenThrow(new ExceptionInput("idMissing"));
+        Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->subscription(-1), $this->anything(), ["edition desc"])->thenThrow(new ExceptionInput("typeViolation"));
+        Phake::when(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->folder(-1), $this->anything(), ["edition desc"])->thenThrow(new ExceptionInput("typeViolation"));
         $exp = new Response(['items' => $this->articles['rest']]);
         // check the contents of the response
         $this->assertMessage($exp, $this->req("GET", "/items")); // first instance of base context
@@ -759,17 +759,17 @@ class TestV1_2 extends \JKingWeb\Arsse\Test\AbstractTest {
         $this->req("GET", "/items", json_encode($in[10]));
         $this->req("GET", "/items", json_encode($in[11]));
         // perform method verifications
-        Phake::verify(Arsse::$db, Phake::times(4))->articleList(Arsse::$user->id, (new Context)->reverse(true), $this->anything());
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->subscription(42), $this->anything());
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->folder(2112), $this->anything());
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->subscription(-1), $this->anything());
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->folder(-1), $this->anything());
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->starred(true), $this->anything());
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(false)->limit(10)->oldestEdition(6), $this->anything()); // offset is one more than specified
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->limit(5)->latestEdition(4), $this->anything());   // offset is one less than specified
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->unread(true), $this->anything());
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, $this->equalTo((new Context)->reverse(true)->markedSince($t), 2), $this->anything());
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(true)->limit(5), $this->anything());
+        Phake::verify(Arsse::$db, Phake::times(4))->articleList(Arsse::$user->id, new Context, $this->anything(), ["edition desc"]);
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->subscription(42), $this->anything(), ["edition desc"]);
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->folder(2112), $this->anything(), ["edition desc"]);
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->subscription(-1), $this->anything(), ["edition desc"]);
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->folder(-1), $this->anything(), ["edition desc"]);
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->starred(true), $this->anything(), ["edition desc"]);
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->limit(10)->oldestEdition(6), $this->anything(), ["edition"]); // offset is one more than specified
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->limit(5)->latestEdition(4), $this->anything(), ["edition desc"]);   // offset is one less than specified
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->unread(true), $this->anything(), ["edition desc"]);
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, $this->equalTo((new Context)->markedSince($t), 2), $this->anything(), ["edition desc"]);
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->limit(5), $this->anything(), ["edition desc"]);
     }
 
     public function testMarkAFolderRead() {
@@ -958,6 +958,6 @@ class TestV1_2 extends \JKingWeb\Arsse\Test\AbstractTest {
         $url = "/items?type=2";
         Phake::when(Arsse::$db)->articleList->thenReturn(new Result([]));
         $this->req("GET", $url, json_encode($in));
-        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->reverse(false)->starred(true), $this->anything());
+        Phake::verify(Arsse::$db)->articleList(Arsse::$user->id, (new Context)->starred(true), $this->anything(), ["edition"]);
     }
 }
diff --git a/tests/cases/REST/TinyTinyRSS/TestAPI.php b/tests/cases/REST/TinyTinyRSS/TestAPI.php
index 5cab996..b79ea2e 100644
--- a/tests/cases/REST/TinyTinyRSS/TestAPI.php
+++ b/tests/cases/REST/TinyTinyRSS/TestAPI.php
@@ -1749,19 +1749,19 @@ LONG_STRING;
         Phake::when(Arsse::$db)->articleList->thenReturn(new Result($this->v([['id' => 0]])));
         Phake::when(Arsse::$db)->articleCount->thenReturn(0);
         Phake::when(Arsse::$db)->articleCount($this->anything(), (new Context)->unread(true))->thenReturn(1);
-        $c = (new Context)->reverse(true);
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(2112), ["id"])->thenThrow(new ExceptionInput("subjectMissing"));
-        Phake::when(Arsse::$db)->articleList($this->anything(), $c, ["id"])->thenReturn(new Result($this->v($this->articles)));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->starred(true), ["id"])->thenReturn(new Result($this->v([['id' => 1]])));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->label(1088), ["id"])->thenReturn(new Result($this->v([['id' => 2]])));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->unread(true), ["id"])->thenReturn(new Result($this->v([['id' => 3]])));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->label(1088)->unread(true), ["id"])->thenReturn(new Result($this->v([['id' => 4]])));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->starred(true), ["id"])->thenReturn(new Result($this->v([['id' => 5]])));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->annotated(true), ["id"])->thenReturn(new Result($this->v([['id' => 6]])));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->limit(5), ["id"])->thenReturn(new Result($this->v([['id' => 7]])));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->offset(2), ["id"])->thenReturn(new Result($this->v([['id' => 8]])));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->limit(5)->offset(2), ["id"])->thenReturn(new Result($this->v([['id' => 9]])));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->oldestArticle(48), ["id"])->thenReturn(new Result($this->v([['id' => 10]])));
+        $c = (new Context);
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(2112), ["id"], ["edited_date desc"])->thenThrow(new ExceptionInput("subjectMissing"));
+        Phake::when(Arsse::$db)->articleList($this->anything(), $c, ["id"], ["edited_date desc"])->thenReturn(new Result($this->v($this->articles)));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->starred(true), ["id"], ["marked_date desc"])->thenReturn(new Result($this->v([['id' => 1]])));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->label(1088), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 2]])));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->unread(true), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 3]])));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->label(1088)->unread(true), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 4]])));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->starred(true), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 5]])));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->annotated(true), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 6]])));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->limit(5), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 7]])));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->offset(2), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 8]])));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->limit(5)->offset(2), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 9]])));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->oldestArticle(48), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 10]])));
         $out1 = [
             $this->respErr("INCORRECT_USAGE"),
             $this->respGood([]),
@@ -1793,9 +1793,9 @@ LONG_STRING;
             $this->assertMessage($out1[$a], $this->req($in1[$a]), "Test $a failed");
         }
         for ($a = 0; $a < sizeof($in2); $a++) {
-            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(false)->markedSince(Date::sub("PT24H")), 2), ["id"])->thenReturn(new Result($this->v([['id' => 1001]])));
-            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(true)->modifiedSince(Date::sub("PT24H")), 2), ["id"])->thenReturn(new Result($this->v([['id' => 1002]])));
-            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(true)->modifiedSince(Date::sub("PT24H"))->starred(true), 2), ["id"])->thenReturn(new Result($this->v([['id' => 1003]])));
+            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(false)->markedSince(Date::sub("PT24H")), 2), ["id"], ["marked_date desc"])->thenReturn(new Result($this->v([['id' => 1001]])));
+            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(true)->modifiedSince(Date::sub("PT24H")), 2), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 1002]])));
+            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(true)->modifiedSince(Date::sub("PT24H"))->starred(true), 2), ["id"], ["edited_date desc"])->thenReturn(new Result($this->v([['id' => 1003]])));
             $this->assertMessage($out2[$a], $this->req($in2[$a]), "Test $a failed");
         }
     }
@@ -1853,25 +1853,25 @@ LONG_STRING;
         Phake::when(Arsse::$db)->articleList->thenReturn($this->generateHeadlines(0));
         Phake::when(Arsse::$db)->articleCount->thenReturn(0);
         Phake::when(Arsse::$db)->articleCount($this->anything(), (new Context)->unread(true))->thenReturn(1);
-        $c = (new Context)->limit(200)->reverse(true);
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(2112), $this->anything())->thenThrow(new ExceptionInput("subjectMissing"));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->starred(true), $this->anything())->thenReturn($this->generateHeadlines(1));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->label(1088), $this->anything())->thenReturn($this->generateHeadlines(2));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->unread(true), $this->anything())->thenReturn($this->generateHeadlines(3));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->label(1088)->unread(true), $this->anything())->thenReturn($this->generateHeadlines(4));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->starred(true), $this->anything())->thenReturn($this->generateHeadlines(5));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->annotated(true), $this->anything())->thenReturn($this->generateHeadlines(6));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->limit(5), $this->anything())->thenReturn($this->generateHeadlines(7));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->offset(2), $this->anything())->thenReturn($this->generateHeadlines(8));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->limit(5)->offset(2), $this->anything())->thenReturn($this->generateHeadlines(9));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->oldestArticle(48), $this->anything())->thenReturn($this->generateHeadlines(10));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c), $this->anything())->thenReturn($this->generateHeadlines(11));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->labelled(true), $this->anything())->thenReturn($this->generateHeadlines(12));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->folderShallow(0), $this->anything())->thenReturn($this->generateHeadlines(13));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->folderShallow(42), $this->anything())->thenReturn($this->generateHeadlines(14));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->folder(42), $this->anything())->thenReturn($this->generateHeadlines(15));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->reverse(false), $this->anything())->thenReturn($this->generateHeadlines(16));
-        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->searchTerms(["interesting"]), $this->anything())->thenReturn($this->generateHeadlines(17));
+        $c = (new Context)->limit(200);
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(2112), $this->anything(), ["edited_date desc"])->thenThrow(new ExceptionInput("subjectMissing"));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->starred(true), $this->anything(), ["marked_date desc"])->thenReturn($this->generateHeadlines(1));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->label(1088), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(2));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->unread(true), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(3));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->label(1088)->unread(true), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(4));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->starred(true), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(5));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->annotated(true), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(6));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->limit(5), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(7));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->offset(2), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(8));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->limit(5)->offset(2), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(9));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->oldestArticle(48), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(10));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(11));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->labelled(true), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(12));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->folderShallow(0), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(13));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->folderShallow(42), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(14));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->folder(42), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(15));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c), $this->anything(), ["edited_date"])->thenReturn($this->generateHeadlines(16));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (clone $c)->subscription(42)->searchTerms(["interesting"]), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(17));
         $out2 = [
             $this->respErr("INCORRECT_USAGE"),
             $this->outputHeadlines(11),
@@ -1909,9 +1909,9 @@ LONG_STRING;
             $this->assertMessage($out2[$a], $this->req($in2[$a]), "Test $a failed");
         }
         for ($a = 0; $a < sizeof($in3); $a++) {
-            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(false)->markedSince(Date::sub("PT24H")), 2), $this->anything())->thenReturn($this->generateHeadlines(1001));
-            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(true)->modifiedSince(Date::sub("PT24H")), 2), $this->anything())->thenReturn($this->generateHeadlines(1002));
-            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(true)->modifiedSince(Date::sub("PT24H"))->starred(true), 2), $this->anything())->thenReturn($this->generateHeadlines(1003));
+            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(false)->markedSince(Date::sub("PT24H")), 2), $this->anything(), ["marked_date desc"])->thenReturn($this->generateHeadlines(1001));
+            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(true)->modifiedSince(Date::sub("PT24H")), 2), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(1002));
+            Phake::when(Arsse::$db)->articleList($this->anything(), $this->equalTo((clone $c)->unread(true)->modifiedSince(Date::sub("PT24H"))->starred(true), 2), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(1003));
             $this->assertMessage($out3[$a], $this->req($in3[$a]), "Test $a failed");
         }
     }
@@ -1990,7 +1990,7 @@ LONG_STRING;
         ]);
         $this->assertMessage($exp, $test);
         // test 'include_header' with an erroneous result
-        Phake::when(Arsse::$db)->articleList($this->anything(), (new Context)->limit(200)->reverse(true)->subscription(2112), $this->anything())->thenThrow(new ExceptionInput("subjectMissing"));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (new Context)->limit(200)->subscription(2112), $this->anything(), ["edited_date desc"])->thenThrow(new ExceptionInput("subjectMissing"));
         $test = $this->req($in[6]);
         $exp = $this->respGood([
             ['id' => 2112, 'is_cat' => false, 'first_id' => 0],
@@ -2005,7 +2005,7 @@ LONG_STRING;
         ]);
         $this->assertMessage($exp, $test);
         // test 'include_header' with skip
-        Phake::when(Arsse::$db)->articleList($this->anything(), (new Context)->reverse(true)->limit(1)->subscription(42), $this->anything())->thenReturn($this->generateHeadlines(1867));
+        Phake::when(Arsse::$db)->articleList($this->anything(), (new Context)->limit(1)->subscription(42), $this->anything(), ["edited_date desc"])->thenReturn($this->generateHeadlines(1867));
         $test = $this->req($in[8]);
         $exp = $this->respGood([
             ['id' => 42, 'is_cat' => false, 'first_id' => 1867],
diff --git a/tests/lib/AbstractTest.php b/tests/lib/AbstractTest.php
index 30b69b0..1644b59 100644
--- a/tests/lib/AbstractTest.php
+++ b/tests/lib/AbstractTest.php
@@ -18,6 +18,7 @@ use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Message\ResponseInterface;
 use Zend\Diactoros\Response\JsonResponse;
+use Zend\Diactoros\Response\XmlResponse;
 
 /** @coversNothing */
 abstract class AbstractTest extends \PHPUnit\Framework\TestCase {
@@ -98,6 +99,8 @@ abstract class AbstractTest extends \PHPUnit\Framework\TestCase {
         if ($exp instanceof JsonResponse) {
             $this->assertEquals($exp->getPayload(), $act->getPayload(), $text);
             $this->assertSame($exp->getPayload(), $act->getPayload(), $text);
+        } elseif ($exp instanceof XmlResponse) {
+            $this->assertXmlStringEqualsXmlString((string) $exp->getBody(), (string) $act->getBody(), $text);
         } else {
             $this->assertEquals((string) $exp->getBody(), (string) $act->getBody(), $text);
         }
diff --git a/vendor-bin/csfixer/composer.lock b/vendor-bin/csfixer/composer.lock
index a5945c4..faa225f 100644
--- a/vendor-bin/csfixer/composer.lock
+++ b/vendor-bin/csfixer/composer.lock
@@ -522,16 +522,16 @@
         },
         {
             "name": "symfony/console",
-            "version": "v4.3.1",
+            "version": "v4.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "d50bbeeb0e17e6dd4124ea391eff235e932cbf64"
+                "reference": "b592b26a24265a35172d8a2094d8b10f22b7cc39"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/d50bbeeb0e17e6dd4124ea391eff235e932cbf64",
-                "reference": "d50bbeeb0e17e6dd4124ea391eff235e932cbf64",
+                "url": "https://api.github.com/repos/symfony/console/zipball/b592b26a24265a35172d8a2094d8b10f22b7cc39",
+                "reference": "b592b26a24265a35172d8a2094d8b10f22b7cc39",
                 "shasum": ""
             },
             "require": {
@@ -593,20 +593,20 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2019-06-05T13:25:51+00:00"
+            "time": "2019-06-13T11:03:18+00:00"
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v4.3.1",
+            "version": "v4.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
-                "reference": "4e6c670af81c4fb0b6c08b035530a9915d0b691f"
+                "reference": "d257021c1ab28d48d24a16de79dfab445ce93398"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/4e6c670af81c4fb0b6c08b035530a9915d0b691f",
-                "reference": "4e6c670af81c4fb0b6c08b035530a9915d0b691f",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/d257021c1ab28d48d24a16de79dfab445ce93398",
+                "reference": "d257021c1ab28d48d24a16de79dfab445ce93398",
                 "shasum": ""
             },
             "require": {
@@ -663,7 +663,7 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2019-05-30T16:10:05+00:00"
+            "time": "2019-06-13T11:03:18+00:00"
         },
         {
             "name": "symfony/event-dispatcher-contracts",
@@ -725,16 +725,16 @@
         },
         {
             "name": "symfony/filesystem",
-            "version": "v4.3.1",
+            "version": "v4.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "bf2af40d738dec5e433faea7b00daa4431d0a4cf"
+                "reference": "b9896d034463ad6fd2bf17e2bf9418caecd6313d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/bf2af40d738dec5e433faea7b00daa4431d0a4cf",
-                "reference": "bf2af40d738dec5e433faea7b00daa4431d0a4cf",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/b9896d034463ad6fd2bf17e2bf9418caecd6313d",
+                "reference": "b9896d034463ad6fd2bf17e2bf9418caecd6313d",
                 "shasum": ""
             },
             "require": {
@@ -771,20 +771,20 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2019-06-03T20:27:40+00:00"
+            "time": "2019-06-23T08:51:25+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v4.3.1",
+            "version": "v4.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "b3d4f4c0e4eadfdd8b296af9ca637cfbf51d8176"
+                "reference": "33c21f7d5d3dc8a140c282854a7e13aeb5d0f91a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/b3d4f4c0e4eadfdd8b296af9ca637cfbf51d8176",
-                "reference": "b3d4f4c0e4eadfdd8b296af9ca637cfbf51d8176",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/33c21f7d5d3dc8a140c282854a7e13aeb5d0f91a",
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index bc43590..e27b08c 100644
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@@ -786,16 +786,16 @@
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index ad49752..a544acc 100644
--- a/vendor-bin/robo/composer.lock
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@@ -1092,16 +1092,16 @@
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@@ -1295,16 +1295,16 @@
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@@ -1569,16 +1569,16 @@
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@@ -1676,7 +1676,7 @@
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