Dxwg: Entailment of schema.org [RES]

[jpullmann]

Entailment of schema.org [RES]

Define schema.org equivalents for DCAT properties to support entailment of schema.org compliant profiles of DCAT records.

Related use cases: Discoverability by mainstream search engines [ID40] 

[andrea-perego]

Some work has been carried out in the framework of SDW that can turn to be relevant here:

https://www.w3.org/2015/spatial/wiki/ISO_19115_-_DCAT_-_Schema.org_mapping

The specified mappings were based on existing work, including a mapping of DCAT-AP, GeoDCAT-AP, and StatDCAT-AP to Schema.org:

https://ec-jrc.github.io/dcat-ap-to-schema-org/

[makxdekkers]

This would be very useful for tools that could create the relevant schema.org markup for a landing page for the dataset based on the DCAT description.

[andrea-perego]

This would be very useful for tools that could create the relevant schema.org markup for a landing page for the dataset based on the DCAT description.

The DCAT-AP to Schema.org mapping exercise I mentioned earlier in this thread includes also SPARQL queries implementing such mappings:

https://github.com/ec-jrc/dcat-ap-to-schema-org/tree/master/sparql

[dr-shorthair]

I propose adding an RDF alignment document for DCAT-schema.org to enable this discussion

[dr-shorthair]

More mappings from SDWWG and Project Open Data added in #146

[dr-shorthair]

Preliminary DCAT-schema.org alignment here: https://github.com/w3c/dxwg/blob/gh-pages/dcat/rdf/schema.ttl

[dr-shorthair]

This repo https://github.com/earthcubearchitecture-project418/p418Vocabulary#dataset-diagram provides a detailed analysis of how schema.org supports describing a dataset.

[azaroth42]

Could someone explain the relevance of profile-negotiation here, other than as an instance of negotiating for schema.org vs dcat? :)

[dr-shorthair]

@rob-metalinkage responded on the email list:

Thats pretty much the basic case - both schema.org and dcat might be expressed in RDF using turtle serialisation - so its not MIME type negotation, rather "profile".

Profiles are semantically finer grained than just the schema - so covers the case of choices of both structure and content.

rob A

[larsgsvensson]

If this is only about selecting content that is packaged using schema.org, this issue is out of scope for profile-negotiation.

[davebrowning]

Isn't this addressed by this section in the ED: https://w3c.github.io/dxwg/dcat/#dcat-sdo? What more is needed in DCAT to address the requirement?