As many of you may know, MultiContent Revisions are coming soon (October?) to a wiki near you. This means that we need changes to the XML dumps schema; these changes will likely NOT be backwards compatible.
Initial discussion will take place here: https://phabricator.wikimedia.org/T199121
For background on MultiContent Revisions and their use on e.g. Commons or WikiData, see:
https://phabricator.wikimedia.org/T200903 (Commons media medata) https://phabricator.wikimedia.org/T194729 (Wikidata entites) https://www.mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions (MCR generally)
There may be other, better tickets/pages for background; feel free to supplement this list if you have such links.
Ariel