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[dxwg] [profiledesc] role assumes closed world of the document

From: Rob Sanderson via GitHub <sysbot+gh@w3.org>
Date: Mon, 25 Jun 2018 16:39:00 +0000
To: public-dxwg-wg@w3.org
Message-ID: <issues.opened-335483488-1529944738-sysbot+gh@w3.org>
azaroth42 has just created a new issue for https://github.com/w3c/dxwg:

== [profiledesc] role assumes closed world of the document ==

The profiledesc ontology has a role associated directly with a resource which it does not control. For example:

```
<https://.../dcat-ap-v11> prof:resource <http://data.europa.eu/...c096> .
<http://data.europa.eu/...c096> prof:resourceRole roles:Guidance .
```

This role is only true for dcap-ap-v11, and the same resource might have other roles in other contexts.  For example a Guidance document for one profile might also include a constraints description for a different profile. Or more likely, a PartConstraints for one profile might be a FullConstraints for another simpler profile.

There are various solutions:

* Named Graphs. Not supported by many systems, and you only get to use the ace once (a triple can be part of only one named graph). 
* Reification. Instead of `resource`, have a node between the Profile and the document that has the role associated with it.  Compare the Web Annotation model for [SpecificResource](https://www.w3.org/TR/annotation-model/#specific-resources). Much more verbose, but good when the vocabulary of roles is open ended.
* Many Relationships. A simpler pattern but harder to extend -- each role is encoded in the predicate between the Profile and the document, eg hasPartConstraints vs hasFullConstraints. Good for implementations when the vocabulary is closed and relatively small.

Reification:

```
<profile1> prof:hasResourceWithRole <rr1> .
<rr1> prof:hasRole roles:PartConstraint ;
         prof:forDocument <constraint1>.
```

Relationships:

```
<profile1> prof:hasPartConstraintResource <constraint1> .
```


Please view or discuss this issue at https://github.com/w3c/dxwg/issues/262 using your GitHub account
Received on Monday, 25 June 2018 16:39:04 UTC

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