Please change the delimiter to ||, or better yet to ?? So that is it more natural to read.
Fixed, using ?? both also supports ||

Had a really quick look, but do the default values actually work?
Tested all three states, also after the ?? change

The correlationIds map VCI option files onto VCI metadata and VP option files onto presentation_definitions files. So they need to be unique for a tuple of these files. For now a correlationId related to VCI does not affect VP or vice versa, so there can be overlap between these. However it is wise to just have a correlationId unique per ecosystem, which then is present in a single file for VCI options, VCI metadata, VP options and presentation_definition

Current changes to correlationId do not ensure that. We can/should just use another identifier for the them, like for instance the ecosystem name

We do not need this now. Let's see in sprint review/start what to do with this