Reference implementation for the Data Model

[bergos]

The Data Model is quite simple, but adds boilerplate code to each library. A reference implementation would be useful.

I would propose to use rdf-data-model. The additional rdf-ext methods are implemented in a different module. I can move the package, if we agree. I also merged the test suite, because it's easier to maintain.

[pieroit]

Agree 👌

[elf-pavlik]

@RubenVerborgh @dmitrizagidulin @blake-regalia

What do you think about moving that reference implementation to @rdfjs orga?

We should also resolve #47 ASAP

[blake-regalia]

Sounds good to me

[RubenVerborgh]

Okay with making this the reference implementation; does not need to be in the orga for me (but no objection).

[elf-pavlik]

We have a reference implementation in orga: https://github.com/rdfjs/data-model