Thanks to all. I'm going on with my test, into another thread into the same
list: A proposal for work pages into wikisource. I found
Module:Wikibase running into it.source too, and it's really interesting,
I'm reviewing my tests.
I apologyze about having opened two list threads more or less on
I took a deeper look to
https://www.mediawiki.org/wiki/Extension:Wikibase_Client/Lua and now I feel
that what I wrote is not so banal; really I can access to any (scheduled)
property of a wikidata element by basic template inclusion, from any page
of it.wikisource; this is so far not possible by