This category is hidden by default at the bottom its member pages in their list of categories, except if users have opted in their preferences to display such hidden categories.
This tracking category should ideally be empty, but it is used for tracking some errors or other conditions that may occur. It may be populated by templates, or by internal MediaWiki features.
Please do not delete this category even if it's empty, thank you.
The following pages are tracked and listed in this category because they use the old extended tag:
which has been deprecated in more recent versions of MediaWiki (because it conflicts with another standard tag reserved by HTML5 for specifying the source of audio and video elements). It should simply be replaced by:
Pages in category "Pages using deprecated source tags"
The following 5 pages are in this category, out of 5 total.