So according to documentation here I should expect that JSON format of Wikidata JSON dumps contains also a modified field with a timestamp of the current revision. I can see a lastrevid field, but no modified. Is this an issue with the documentation or something else? I was looking at, for example, this file.
Description
Details
Related Objects
Event Timeline
I see that API does return the modified field: https://www.wikidata.org/w/api.php?action=wbgetentities&format=json&ids=Q1
This is particular to the web JSON output and is current not expected to appear in dumps.
Adding it there would have to be a feature request etc.
Change 793934 had a related patch set uploaded (by Mitar; author: Mitar):
[mediawiki/extensions/Wikibase@master] Make sure both API and dump include same page metadata fields
Change 793934 merged by jenkins-bot:
[mediawiki/extensions/Wikibase@master] Make sure both API and dump include same page metadata fields.
Change 802921 had a related patch set uploaded (by Mitar; author: Mitar):
[operations/puppet@production] Add page metadata to Wikibase JSON dumps
Change 802921 merged by Jbond:
[operations/puppet@production] Add page metadata to Wikibase JSON dumps
I checked wikidata-20220620-all.json.bz2 and it contains now modified field (alongside other fields which are present in API).