Yes I have noticed this need for use notes, but it is specific to properties, isn't it? I see it in things such as choosing what to put in the "genre" property of an artwork. It would be nice to have some sort of pop-up that you can fill with more than what you put in. For example I get easily confused when I address the relative (as in kinship) properties; "father of the subject" is clear, but what about cousin/nephew etc.? You need more explanation room than can be stuffed in the label field to fit in the drop down. I have thought about this, but don't see any easy solution besides what you have done.

On Thu, Nov 5, 2015 at 10:51 AM, James Heald <j.heald@ucl.ac.uk> wrote:
I have been wondering about the practice of putting use-notes in item descriptions.

For example, on Q6581097 (male)
      https://www.wikidata.org/wiki/Q6581097
the (English) description reads:
      "human who is male (use with Property:P21 sex or gender). For groups of males use with subclass of (P279)."

I have added some myself recently, working on items in the administrative structure of the UK -- for example on Q23112 (Cambridgeshire)
       https://www.wikidata.org/wiki/Q23112
I have changed the description to now read
       "ceremonial county of England (use Q21272276 for administrative non-metropolitan county)"

These "use-notes" are similar to the disambiguating hat-notes often found at the top of articles on en-wiki and others; and just as those hat-notes can be useful on wikis, so such use-notes can be very useful on Wikidata, for example in the context of a search, or a drop-down menu.

But...

Given that the label field is also there to be presentable to end-users in contexts outside Wikidata, (eg to augment searches on main wikis, or to feed into the semantic web, to end up being used in who-knows-what different ways), yet away from Wikidata a string like "Q21272276" will typically have no meaning. Indeed there may not even be any distinct thing corresponding to it.  (Q21272276 has no separate en-wiki article, for example).

So I'm wondering whether these rather Wikidata-specific use notes do really belong in the general description field ?

Is there a case for moving them to a new separate use-note field created for them?

The software could be adjusted to include such a field in search results and drop-downs and the item summary, but they would be a separate data-entry field on the item page, and a separate triple for the SPARQL service, leaving the description field clean of Wikidata-specific meaning, better for third-party and downstream applications.

Am I right to feel that the present situation of just chucking everything into the description field doesn't seem quite right, and we ought to take a step forward from it?

  -- James.

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