Use w3id.org PURL for schema ID

[StroemPhi]

Changes schema and dcat-converter script to use the w3id PURL instead of the GH pages URL for the schema ID.

Closes #8

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[dalito]

Please wait with merging till #20 is done.

[dalito]

#20 is done but it would be good to also merge #29 before this one (if you all agree to it) to avoid fixing conflicts twice.

Note that #29 significantly reduces what is built (and present) in projects/ folder.

[dalito]

@HendrikBorgelt @StroemPhi - What do you think about using the ID https://w3id.org/nfdi-de/dcat-ap-linkml for the LinkML-ified DCAT-AP? (instead of https://w3id.org/nfdi-de/dcat-ap-plus/dcat_ap_linkml)

Putting the more general schema dcat-ap-linkml below the more detailed derived dcat-ap-plus contradicts general expectations on hierarchical ordering. This also would give us an easy path to convert dcat-ap-linkml into a separate repo without breaking URIs if we want to do so in the future.

We just need to make another subfolder in w3id.org and can (for now) continue to redirect into this repo.

[StroemPhi]

@HendrikBorgelt @StroemPhi - What do you think about using the ID https://w3id.org/nfdi-de/dcat_ap_linkml for the LinkML-ified DCAT-AP? (instead of https://w3id.org/nfdi-de/dcat-ap-plus/dcat_ap_linkml)

I somehow feel this would be too much. I'd rather have this remain in the DCAT-AP+ repo as a nice to have artifact but not something I'd advertise.

[HendrikBorgelt]

@StroemPhi, we can still have the dcat_ap_linkml in the repo but generate a w3id namesapce for it. Of cause this would "advertise" it if people look at the w3id folder and search for it's namesapce. But I think this is still very hiden...
The beneftit would be that people can more easily reference your dcat-ap-linkml file. So I am not against it, but i also don't see a need for it.

[StroemPhi]

OK, so you two convinced me. Let's do get another namespace for it, to be on the safe side in the future.

[dalito]

@StroemPhi - Can you rebase and resolve conflicts? They are partly due to the other representations like shex which are no longer build after #29.

[HendrikBorgelt]

looks good

[dalito]

I rebased and resolved the conflicts.

@HendrikBorgelt this uses the new w3id.org PURL for dcat-ap-linkml suggested above.

⚠️ The PURL was initially wrong in the comment. It had underscores, not dashes! ⚠️

Correct: https://w3id.org/nfdi-de/dcat-ap-linkml