The element used for the proposal identifier (id) https://github.com/opencadc/caom2tools/blob/ad1a21ec6106a10969a85d679605051f4963921a/caom2/caom2/tests/data/SampleDerived-CAOM-2.5.xml#L18 does not correspond to the VO-DML definition (proposalID) https://www.opencadc.org/caom2/#Proposal