They probably belong to this spectrum of questions that could be on topic on multiple sites. Questions about portability lean more towards the implementation side and are possibly more appropriate for software engineering stackexchange.
Compliance questions, in my opinion, are off-topic here unless they have some clear connection to the "science" part of data science.
Is there a preferred vocabulary or ontology for data in domain Z?
are probably also on topic on open data stackexchange.
In general, I think other sites will generate more and better answers. However, at this point it's fair to assume that they will be decided on a case by case basis if posted here first.