show class & prop info while/at Mapping

[VladimirAlexiev]

Properties (and to a lesser extent classes) have crucially important info that would be nice to display at Mapping pages.

• both: documentation (comment@en)
• props: whether it's DatatypeProperty or ObjectProperty. Many people don't distinguish between the two, which is a fatal mistake!
• props: domain & range
• classes: place in the hierarchy

Sorry, I don't have a UI design how to display this info. Some notes:

• at display of a Mapping: show (D) or (O) of proos; and popup/hover with all the info
• while editing a Mapping: some sort of autocomplete widget?. Consider the prop name autocompletion at Wikidata

[VladimirAlexiev]

@gcpdev "what kind of stats do you think it would be useful? Property count? Some sort of TF-IDF, for revealing whether the property is specific used in that class or not?"

For target (dbo) props:

1. documentation (comment@en)
2. whether it's DatatypeProperty or ObjectProperty.
3. declared domain, range
4. counts of actual usage: domains, ranges
5. top 10 subject and object values

For source (dbp) props:

• counts and top 10 actual values from the relevant Wikipedia template

Items 4,5 are unclear. But think about how would you analyze property instances to figure out what the property means (because often they don't have documentation). Eg explore

select * {?x dbo:occupation ?y}
select * {?x dbp:occupation ?y}

and try to imagine what needs to be grouped/counted to see the typical cases and the exceptions...

For the domain/range counts, we need "true" classes (as assigned to an entity) and not "inferred" classes. unfortunately the extraction framework records also the inferred classes, and there's no way to distinguish them at present