OperationNotSupported

Andromeda answers 422 with the problem type https://uri.etsi.org/ngsi-ld/errors/OperationNotSupported. The specification defines the operation and the request is well formed, but Andromeda doesn't carry the operation out on this endpoint. That is deliberately rare. Anything the specification doesn't define is an extension instead, and while an extension is off, its paths answer 404 or 405 as if the broker never had them. The specification defines this type and binds it to 422.

When this comes back

• A request carrying the NGSILD-Snapshot header to an endpoint outside the core, temporal and entity-subscription operations, such as a registration, subscription, tenant or @context endpoint. The detail names the three families that take the header. See Snapshots.
• GET /ngsi-ld/v1/jsonldContexts/<identifier> for an entry Andromeda holds only as a fetch cache. Such an entry has no stored document to serve, and the specification says that asking for one in full gives back OperationNotSupported. See Stored @context documents.