dct:creator for dcat:Resource

[agbeltran]

when discussing data citation in #61, we added dct:creator to dcat:Dataset

I believe this property could be moved to the super class dcat:Resource and potentially to other classes, such as dcat:Distribution to (partly) support citation of distributions (#433)

[makxdekkers]

The property is already in the box dcat:Resource in Fig 1 at https://w3c.github.io/dxwg/dcat/#vocabulary-overview, but it should be modeled as a object property with range foaf:Agent like dct:publisher.
Not sure if we foresee cases where individual distributions have their own creator but if it helps with citation then I guess it's OK to put it on distribution too.

[dr-shorthair]

Fixed the figure

[agbeltran]

Thanks both - it is in the figure but not in the text https://w3c.github.io/dxwg/dcat/#Class:Resource; I'll add this.

The other classes that require it and don't inherited from dcat:Resource would be dcat:Distribution and dcat:CatalogRecord

[dr-shorthair]

I was also thinking that we should list the inherited properties in the introduction to each class, and not just expect users to cross check the parent class. So the text in section 6 would better reflect how it is presented in Figure 1 in section 5.

[dr-shorthair]

See #459