Re: Data extension protocol and linking to other reconciliation services

>
>
> I am thinking that it would be nice if the Wikidata service could
>> announce the GND service in the column metadata it returns, such that
>> the resulting column is automatically considered as reconciled to that
>> service when it is fetched in OpenRefine.
>>
>
> Although Wikidata currently has a list of third-party formatter URL
> <https://www.wikidata.org/wiki/Property:P3303>, which are semantically
> similar to a reconciliation service, it fundamentally seems like the wrong
> place to serve as a reconciliation service registry.
>
> With this proposal there would not need to be a reconciliation service
> registry: each service would be free to reference related reconciliation
> services. For the Wikidata reconciliation service, the correspondance
> between Wikidata identifier properties and foreign reconciliation endpoints
> could be stored in Wikidata itself, but would not have to (the
> reconciliation service could fetch it from its own configuration file, or
> any other source).
>
> What is the right place to serve a reconciliation service registry in your
> opinion?
>
Wikidata, in my opinion, could serve as the reconciliation service registry.

But there would be a final problem to solve.  There is no consistent
property that *always links* any "Wikidata property for identifier
<https://www.wikidata.org/wiki/Q19847637>" instance to an Authority that
then might have the "Api endpoint
<https://www.wikidata.org/wiki/Property:P6269>" property.
It seems in Wikidata that there is no consistent property for that linkage
currently if you look at a few of the Identifier properties already there.

1 Authority can provide:
  Several Reconciliation Services:
    Where each might allow reconciling against multiple Identifiers
(currently 5233 total such identifiers)