No type definition was found for "NamedCollectionsOrSurveys" in the abcd2 import.
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Unit may belong to one or several collections or survey projects which have distinctive names and do not correspond to the SourceName. Note that this element refers to the name accepted by the specimen or data holding institution, this may or may not be different from the project name given under Gathering.
Constraints in the context of ABCD 2:
- cardinality 0..1 (=optional single occurrence)