Important! Change in rule for CONCEPT records: concept_code is not longer unique within some vocabularies

[Dymshyts (Dmytry Dymshyts)]

@Christian_Reich

Remove valid_start/end date and invalid reason from concept relationship. Currently you only create valid relationships

No. We just don’t export the invalid any more, because they have no value for the users. Let me think about the suggestion anyway.

Right. We use them only for development purpose. So in production those fields seems to be redundant. Anyway, I would keep them for cases like these:
You create custom relationships originating from 2 billion concepts, then you fix them and fill valid_start/end date and invalid reason. So, it’s fine to give the users CONCEPT_RELATIONSHIP with these fields, so they can use them.

@DTorok

Add a new concept invalid reason ‘R’ for Re-used or Re-purposed.

Look, you have concept A (1970 -2017) and B (2017 - 2099). In both cases you need to check the valid_start/end dates. So, both of them should have invalid_reason =‘R’, right?