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Re: [dxwg] should DCAT 3 provide its own way to indicate the query to pose to the data service endpoints? (#1230)

From: Riccardo Albertoni via GitHub <sysbot+gh@w3.org>
Date: Thu, 16 Jul 2020 16:53:12 +0000
To: public-dxwg-wg@w3.org
Message-ID: <issue_comment.created-659538952-1594918391-sysbot+gh@w3.org>

I agree with @rob-metalinkage  and @dr-shorthair if we discuss describing the capability of the data service thoroughly. Though, I think the use case which has generated this issue (see #1197) was not asking that level of detail. My impression was that they wanted a quick solution to indicate a **predetermined query** (no parameters) to pose to the data services.

Before closing this discussion, I wonder if we want to provide something for the more specific case arisen by Nuno.  And yes, I am playing the devil's advocate a little;)

If we consider, for example, the queries to a SPARQL endpoint,  the query can be embedded in the URL attached to the dcat:downloadURL or similar in the distribution. However, I suspect there might be value in making explicit the query instead of hiding it under dcat:downloadURL or similar. We already have a way to represent the underneath endpoint (i.e., the dcat:accessURL which matches the property-chain dcat:accessService/dcat:endpointURL).

Would it make sense to minting a new property to express the query explicitly? (I have checked on https://lov.linkeddata.es/dataset/lov/terms?q=query for inspiration, there are many terms related to query, but I haven't found one that suits for this case, excepts perhaps schema:query with the text of the query attached).

I share @smrgeoinfo's interoperability worries about providing more than a way to express the same thing, but I am not sure we are duplicating to say the same here.  

Could making the query explicit bring value in some maintenance scenarios, or when the same endpoint serves more datasets? Or it moves part of the efforts from the providers to the consumers without any considerable advantage?

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Received on Thursday, 16 July 2020 16:53:16 UTC

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