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opencadc / caom2

Common Archive Observation Model
GNU Affero General Public License v3.0
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Add NAIF ID to Target? #21

Closed wlandry closed 4 years ago

wlandry commented 7 years ago

Most (but not all) moving object targets have a NAIF ID. Target already has a keywords field, so we can add it there. It might be better for there to be a separate field for it. I am not sure, though.

pdowler commented 7 years ago

Since there are definitely multiple types of IDs and individual targets may have multiple IDs the conceptual model is definitely Target -> TargetID in a one-to-many relationship. The different types suggest using URIs with scheme == type and scheme-specific-part = ID, for example

naif:170100

and then adding a field to Target to store a list of URIs so it is separate from keywords and more syntactically strict.

pdowler commented 5 years ago

Having more than one resolvable identifier is more complicated and adds minimal value.

targetID [0..1] : URI