Currently all collections default, for text, to the general license of the wiki, while usually adding more information for licenses of files.
However on some wikis the copyright status of content varies greatly and some would like e.g. Wikisource books to clearly state they're in the public domain.
The blocker of this is some [[m:Book management]] and/or [[mw:Files and licenses concept]] infrastructure, as it's not feasible to parse Wikisource templates (let alone all other wikis in the world). John thinks a suitable blocking bug already is filed.
Version: unspecified
Severity: enhancement