Someone defined this constraint in a template, probably meaning properties with this constraint should only be used as a source.
Description
Description
Event Timeline
Tamslo set Security to None.
Tamslo moved this task from Backlog to WBQC Backlog on the Wikibase-Quality board.Jun 19 2015, 2:52 PM2015-06-19 14:52:42 (UTC+0)
Lydia_Pintscher moved this task from incoming to monitoring on the Wikidata board.Jun 24 2015, 10:38 AM2015-06-24 10:38:21 (UTC+0)
Lydia_Pintscher renamed this task from Implement "Used as source" constraint to [Task] Implement "Used as source" constraint.Aug 17 2015, 4:12 PM2015-08-17 16:12:48 (UTC+0)
Lydia_Pintscher moved this task from monitoring to ready to go on the Wikidata board.Aug 17 2015, 4:30 PM2015-08-17 16:30:38 (UTC+0)