Strategy for DwC-A Export of references
References are an extension which links to core (taxa).
However, references may link to multiple taxa (or even other data). We need to decide if we want a record per such relationship or if each reference should occur only once. Currently each reference is exported only once so the relationship to other taxa gets lost. At the same time in core we do have some reference information already so the reference extension is maybe not needed at all. The reference extension does, like all extensions, not have an own identifier (except for the identifier field(s) meant for ISBN, DOI, etc. But the later could be used for CDM uuid also.
Maybe this should all be configurable. But we should also check how IPT is doing it by default.
Note: There are 2 reference extensions, the standard one and the EOL one. Currently only the first is implemented.