Hi everyone :)
We've finally done all the groundwork for unit support. I'd love for you to give the first version a try on the test system here: http://wikidata.beta.wmflabs.org/wiki/Q23950
There are a few known issues still but since this is one of the things holding back Wikidata I made the call to release now and work on these remaining things after that. What I know is still missing: * We're showing the label of the item of the unit. We should be showing the symbol of the unit in the future. (https://phabricator.wikimedia.org/T77983) * We can't convert between units yet - we only have the groundwork for it so far. (https://phabricator.wikimedia.org/T77978) * The items representing often-used units should be ranked higher in the selector. (https://phabricator.wikimedia.org/T110673) * When editing an existing value you see the URL of unit's item. This should be replaced by the label. (https://phabricator.wikimedia.org/T110675) * When viewing a diff of a unit change you see the URL of the unit's item. This should be replaced by the label. (https://phabricator.wikimedia.org/T108808) * We need to think some more about the automatic edit summaries for unit-related changes. (https://phabricator.wikimedia.org/T108807)
If you find any bugs or if you are missing other absolutely critical things please let me know here or file a ticket on phabricator.wikimedia.org. If everything goes well we can get this on Wikidata next Wednesday.
Cheers Lydia