feature request #9158
Handle identiy matching in matching framework
XXX_OR_xxx_NULL usually requires that at least 1 other parameter guarantees the identity of the 2 matching objects.
E.g. for books this is the title or the abbrev. title while parsed articles or book sections usually do not have such an identifying parameter.
XXX_OR_xxx_NULL matching should have the possibility to define that at least one identifying parameter exists (or it should be the default that this is the case).
This concept is still missing in the current frameworks.