'id' => "arsse_articles.id", // The article's unchanging numeric ID
'edition' => "latest_editions.edition", // The article's numeric ID which increases each time it is modified in the feed
'latest_edition' => "max(latest_editions.edition)", // The most recent of all editions
'url' => "arsse_articles.url", // The URL of the article's full content
'title' => "arsse_articles.title", // The title
'author' => "arsse_articles.author", // The name of the author
'content' => "coalesce(case when arsse_subscriptions.scrape = 1 then arsse_articles.content_scraped end, arsse_articles.content)", // The article content
'guid' => "arsse_articles.guid", // The GUID of the article, as presented in the feed (NOTE: Picofeed actually provides a hash of the ID)
'fingerprint' => "arsse_articles.url_title_hash || ':' || arsse_articles.url_content_hash || ':' || arsse_articles.title_content_hash", // A combination of three hashes
'folder' => "coalesce(arsse_subscriptions.folder,0)", // The folder of the article's feed. This is mainly for use in WHERE clauses
'subscription' => "arsse_subscriptions.id", // The article's parent subscription
'feed' => "arsse_subscriptions.feed", // The article's parent feed
'hidden' => "coalesce(arsse_marks.hidden,0)", // Whether the article is hidden
'starred' => "coalesce(arsse_marks.starred,0)", // Whether the article is starred
'unread' => "abs(coalesce(arsse_marks.read,0) - 1)", // Whether the article is unread
'note' => "coalesce(arsse_marks.note,'')", // The article's note, if any
'published_date' => "arsse_articles.published", // The date at which the article was first published i.e. its creation date
'edited_date' => "arsse_articles.edited", // The date at which the article was last edited according to the feed
'modified_date' => "arsse_articles.modified", // The date at which the article was last updated in our database
'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'))", // The date at which the article metadata was last modified by the user
'subscription_title' => "coalesce(arsse_subscriptions.title, arsse_feeds.title)", // The parent subscription's title
'media_url' => "arsse_enclosures.url", // The URL of the article's enclosure, if any (NOTE: Picofeed only exposes one enclosure)
'media_type' => "arsse_enclosures.type", // The Content-Type of the article's enclosure, if any