Is rdfType a URL, URI or IRI?

[Stephen-Gates]

Data Curator makes data packages. We want to ensure that the user enters a correct value in the rdfType property. As discussed in Data-Curator #314 we are unsure how to validate it.

Perhaps the FD spec and the referenced RDF Schema spec should align given the change from URI to IRI.

[rufuspollock]

@Stephen-Gates sounds good.

[Stephen-Gates]

Sorry @rufuspollock I wasn't clear...

The W3C RDF Schema 1.1 spec changed from URI to using IRI . So do you want the spec to be changed to...

Rich Types

A richer, "semantic", description of the "type" of data in a given column MAY be provided using a rdfType property on a field descriptor.

The value of of the rdfType property MUST be the URI IRI of a RDF Class, that is an instance or subclass of RDF Schema Class object

As I was told that the code to validate an IRI is difficult, Data Curator is validating that the rdfType is a URL.

I notice that tableschema.js does not validate rdfType https://github.com/frictionlessdata/tableschema-js/blob/f8539f5326caff210d4653ac5446144e596a067c/src/profiles/table-schema.json#L101

[rufuspollock]

@Stephen-Gates I'd stick with whatever is easy and well-supported to validate. If that means sticking with URI (and, perhaps for validation, URL) that's good with me.