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Re: [dxwg] Links across DCAT rec, rdf files and namespace pages (#377)

From: David Browning via GitHub <sysbot+gh@w3.org>
Date: Mon, 29 Apr 2019 15:25:12 +0000
To: public-dxwg-wg@w3.org
Message-ID: <issue_comment.created-487624815-1556551510-sysbot+gh@w3.org>
Finally got some time to look at this a bit more.  

Before I check with W3, I think it might be useful to think through how we expect this to work in the future.  What happens if there is a future breaking change to the ontology?  In that case, where people have used the latest version URI http://www.w3.org/ns/dcat#, then their use of the vocabulary will be invalid (since it will pick up the new version).  That means that any future breaking change would introduce a new namespace - I think this is what happened with ODRL in POE, who use the namespace https://www.w3.org/ns/odrl/2/  for their latest work.) 

We plan to just use a version number for the vocabulary (i.e. "2" for now, and then "3", "4"  etc,) but the versioning of the namespace would be different to that - it would only clock up when a breaking change was needed for some reason.

In our case, our new ontology for DCAT2 aims to be backwardly compatible with the 2014 vocabulary so we don't need to introduce that namespace versioning - we can and should keep it as is. 

@andrea-perego @dr-shorthair @riccardoAlbertoni @pwin @agbeltran - does this sound right to you? 

[BTW, its been a while since I checked that we haven't introduced a breaking change by accident......especially with the modularisation, but I'll need a clearer head to do that]





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