Remove rml:RelativePathSource from examples and substitute by rml:FilePath

[hartig]

The RML-Core spec contains several examples with rml:RelativePathSource (for instance, Example 3), but other than in the examples, rml:RelativePathSource is not mentioned anywhere else in the RML-Core spec. And the RML-IO spec doesn't mention it at all. It is also not mentioned in any of the relevant ontology files, like http://w3id.org/rml/ and http://w3id.org/rml/io/. Where is rml:RelativePathSource defined?

[dachafra]

@pmaria, although rml:RelativePathSource is used in RML-core, I think it has to be defined in RML-IO, right?

[pmaria]

Yes, this is a bug. This has been renamed to rml:FilePath at some point in time (I missed that as well).
Since it is a type of rml:Source, it is defined under access descriptions in https://kg-construct.github.io/rml-io-registry/. However, I'd say it still needs work.

[dachafra]

Thanks for the clarification @pmaria

So there is a bug in the spec and rml:RelativePathSource has to be changed to rml:FilePath.

Suggestion: rename this issue, and I'll take care of the update

[pmaria]

@dachafra This actually impacts all specs, so requires some coordination.