Dear all, 
there is an important Request for Comments on Wikidata.
https://www.wikidata.org/wiki/Wikidata:Requests_for_comment/References_and_sources#How_to_store_edition_data

For those of you who don't know it yet, there is a specific Wikidata Books task force
http://www.wikidata.org/wiki/Wikidata:Books_task_force

It's really important that the Wikisource community starts engaging Wikidata issues, especially because it will soon be needed a decision regarding the relation between Wikidata and Wikisource.

We need to discuss "edition data" on Wikidata, as they represent the 99% of metadata that are on Wikisource (and obviously Commons).

Aubrey