Issue 644

[nicholascar]

Addresses Issues https://github.com/w3c/dxwg/issues/643 & #644: "prof:isTransitiveProfileOf needs more convincing case and/or example" & "Specify the semantics of prof:isTransitiveProfileOf wrt prof:isProfileOf" in separate commits.

[aisaac]

@nicholascar would it be possible to split this PR? I believe that the commit for isTransitiveProfileOf semantics is fine, and we could close issue #644 , but in the current state I think the example is not right enough for closing #643 . Separating them would allow the latter to not block the former!

[aisaac]

@nicholascar @rob-metalinkage @kcoyle the discussion on PROF examples yesterday and on #745 makes me realize that we may block something useful if this PR is not merged. In that case it can be merged, but by all means it shouldn't mean that the corresponding issues can be closed now!
(even though I still think that #644 could be closed, and that splitting this PR would have been ideal...)

[nicholascar]

Thanks @aisaac, we’ll get this merged, leave the issues open and in the future I’ll try and make more granular PRs that try and tackle single smaller things each. That should make approving bits easier and reduce the chance of things being held up!