HTML
You may be looking for the following:
- Hilfe:HTML in Wikitext — HTML tags in wikitext
- Hilfe:Lint-Fehler/obsolete-tag — for deprecated HTML elements (detected by Lint)
- HTML-Beschränkung — about restriction of HTML use in MediaWiki
- HTML-Formular — class for handling user interface forms
- Handbuch:HTML-Vorlagen — generate HTML content from Mustache templates
- HTML5 — Nutzung von HTML5-Funktionen im MediaWiki
- Handbuch:Html.php — the file used in extensions.