Oh boy. I thought I had a few things figured out with Wikidata...until I read through the Property Talk discussions for
https://www.wikidata.org/wiki/Property_talk:P2236
(with its mentions of Freebase mapping)
So... I've been adding a few bits of Schema.org mapping into Wikidata today, and stumbled upon a few things that made me rethink a few things...lolol.
QUESTION: How to state that a Wikidata Entity (not a Property) such as place of birth https://www.wikidata.org/wiki/Q1322263 is the same concept or idea as a Schema.org property http://schema.org/birthPlace ?
I thought I could use P2236 above... but then it seems its for WD Properties, not Entities (subjects) ?
SOLUTION ? Perhaps we could do a best practice of treating http://schema.org/birthPlace as an actual Identifier for the place of birth concept https://www.wikidata.org/wiki/Q1322263
...while reserving the WD Property place of brith https://www.wikidata.org/wiki/Property:P19 to use equivalent property https://www.wikidata.org/wiki/Property:P1628 ?
TPT and Denny didn't leave enough notes in there for what to do about external mapping cases of external vocabularies that are also loosely considered as metadata dictionaries as well for the common web and developers, like Schema.org is.
Thoughts on the SOLUTION proposed ?
Thad +ThadGuidry https://www.google.com/+ThadGuidry
Perhaps the new 'exact match'? https://m.wikidata.org/wiki/Property:P2888
On Jun 17, 2016, at 8:26 PM, Thad Guidry thadguidry@gmail.com wrote:
Oh boy. I thought I had a few things figured out with Wikidata...until I read through the Property Talk discussions for
https://www.wikidata.org/wiki/Property_talk:P2236
(with its mentions of Freebase mapping)
So... I've been adding a few bits of Schema.org mapping into Wikidata today, and stumbled upon a few things that made me rethink a few things...lolol.
QUESTION: How to state that a Wikidata Entity (not a Property) such as place of birth https://www.wikidata.org/wiki/Q1322263 is the same concept or idea as a Schema.org property http://schema.org/birthPlace ?
I thought I could use P2236 above... but then it seems its for WD Properties, not Entities (subjects) ?
SOLUTION ? Perhaps we could do a best practice of treating http://schema.org/birthPlace as an actual Identifier for the place of birth concept https://www.wikidata.org/wiki/Q1322263
...while reserving the WD Property place of brith https://www.wikidata.org/wiki/Property:P19 to use equivalent property https://www.wikidata.org/wiki/Property:P1628 ?
TPT and Denny didn't leave enough notes in there for what to do about external mapping cases of external vocabularies that are also loosely considered as metadata dictionaries as well for the common web and developers, like Schema.org is.
Thoughts on the SOLUTION proposed ?
Thad +ThadGuidry _______________________________________________ Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
Hello Thad!
What is your use case for linking Wikidata items to schema.org properties?
It seems to me that the most important use cases of a mapping between schema.org and Wikidata would be 1) to export Wikidata content using schema.org vocabulary 2) import structured data that uses schema.org into Wikidata 3) allow schema.org publishers to use Wikidata properties to enhance their published data.
I don't see in this 3 use cases one in which considering schema.org property IRIs like http://schema.org/birthPlace as also more or less ids for regular individuals and mapping them to Wikidata items is actually useful.
So, I would stick with using schema.org properties IRIs as usual RDF property IRIs and use them in Wikidata as such. But, if you have a strong use case use 'exact match' (or something a bit weaker) is probably the way to go. P2236 (sous-propriété externe) have been intended to be more or less similar to rdfs:subPropertyOf.
Cheers,
Thomas
PS: The canonical IRIs for Wikidata entities are http://www.wikidata.org/entity/QXXX and not http://www.wikidata.org/wiki/QXXX
Le 18 juin 2016 à 07:33, Benjamin Good ben.mcgee.good@gmail.com a écrit :
Perhaps the new 'exact match'? https://m.wikidata.org/wiki/Property:P2888
On Jun 17, 2016, at 8:26 PM, Thad Guidry thadguidry@gmail.com wrote:
Oh boy. I thought I had a few things figured out with Wikidata...until I read through the Property Talk discussions for
https://www.wikidata.org/wiki/Property_talk:P2236
(with its mentions of Freebase mapping)
So... I've been adding a few bits of Schema.org mapping into Wikidata today, and stumbled upon a few things that made me rethink a few things...lolol.
QUESTION: How to state that a Wikidata Entity (not a Property) such as place of birth https://www.wikidata.org/wiki/Q1322263 is the same concept or idea as a Schema.org property http://schema.org/birthPlace ?
I thought I could use P2236 above... but then it seems its for WD Properties, not Entities (subjects) ?
SOLUTION ? Perhaps we could do a best practice of treating http://schema.org/birthPlace as an actual Identifier for the place of birth concept https://www.wikidata.org/wiki/Q1322263
...while reserving the WD Property place of brith https://www.wikidata.org/wiki/Property:P19 to use equivalent property https://www.wikidata.org/wiki/Property:P1628 ?
TPT and Denny didn't leave enough notes in there for what to do about external mapping cases of external vocabularies that are also loosely considered as metadata dictionaries as well for the common web and developers, like Schema.org is.
Thoughts on the SOLUTION proposed ?
Thad +ThadGuidry _______________________________________________ Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
TPT,
The use cases of why to store the mappings in Wikidata itself (rather than Schema.org) are mentioned in our Schema.org issue here: https://github.com/schemaorg/schemaorg/issues/280 Where Dan summarized and updated this in January basedon Lydia's feedback. And its also much easier to express and maintain mappings in Wikidata :)
So that is 2 votes so far to use the Statement "exact match" P2888, and not link the concepts between the two using the Identifier construct.
QUESTION: I await a few more thoughts and reasons why NOT to use an Identifier? I am looking at the nice hierarchy here on talk for Identifier https://www.wikidata.org/wiki/Talk:Q853614 and my personal thoughts are that Schema.org Type and Property can be looked at in 2 ways in Wikidata, as an Identifier and as a Concept, so.... ?
Thad +ThadGuidry https://www.google.com/+ThadGuidry
BTW, the 2 Wikidata examples given for "exact match" here https://m.wikidata.org/wiki/Property:P2888 are actually Unique Identifiers for the concepts of Soil and Asthma !!!.... So again, I am a little confused in the usages of "exact match" https://m.wikidata.org/wiki/Property:P2888 and "identifier" https://m.wikidata.org/wiki/Q853614 and "Unique Identifier" https://www.wikidata.org/wiki/Q6545185 (I know the differences in the real world...I am just not seeing them applied the same way in Wikidata...and that's why I am getting confused when I am looking at this within Wikidata pages, talk, etc.)
QUESTIONS: Its seems that Wikidata wants to reserve Identifier's for usages on Objects ? and having "exact match" apply to Concepts ? Is that a hard and fast rule ? Where is the original discussions for Identifier in Wikidata ? Perhaps that's what I need to read and see if there are some constraints on usage on either ? I didn't see any so far.
Thad +ThadGuidry https://www.google.com/+ThadGuidry