seqcol digest -> sequence digests: Given a seqcol digest, retrieve sequence digests for all contained sequences with the /collection/:digest/:level endpoint by setting the level to 1, or omitting it.
seqcol digest -> sequences: Given a seqcol digest, sequences themselves for all contained sequences can be retrieved by the /collection/:digest/:level endpoint by setting the level to 2 (if this is allowed by the server). Or, you can use the sequence digests retrieve at level=1 to look up actual sequences using a refget server.
seqcol digest -> metadata: Any metadata known by the server will be retrieved by using /collection/:digest.
seqcol digest -> aliases of seqcol: Aliases are a not a built-in part of the seqcol spec, so this capability will depend on the underlying provider. If the provider provides aliases, you can retrieve them using /collection/:digest.
2 seqcol digests -> assessment of compatibility: Provided by the /comparison endpoint.
seqcol digest + sequences -> validation claim: Use the seqcol algorithm to compute the digest of the set of sequences, and then use the comparison function to validate (or, if you validation requires strict identity, just confirm that the digests match).
Sequence collection as input
sequences -> refget digests: Individual sequences can be converted into refget digests using the refget algorithm
sequences -> seqcol digest: Sequence collections can be converted into seqcol digests using the seqcol algorithm. To obtain a sequence digest, follow the algorithm outlined above, sequences -> refget digests -> seqcol digest.
Refget digest as input
refget digest -> seqcol digests containing this sequence: Use the containing_collections secondary endpoint.
many refget digests -> seqcol digests containing all of these sequences: Repeated application of containing_collections endpoint?
Coordinate system as input
coordinate system -> seqcol digest: If you have only a coordinate system (lengths with no sequences), you may still compute a seqcol digest using the seqcol algorithm, because the sequences themselves are optional. Coordinate systems can therefore be uniquely encoded, retrieved, and compared using the seqcol protocol.
Related operations: What seqcol does not do
sequences -> sequence names: This is the refget reverse lookup.
alias -> seqcol digest: Will the API offer this?
seqcol digest -> other seqcol digests compatible at some level: The database does not store comparison flags, so if you're searching for compatible collections you'd need to retrieve and compute the compatible yourself using the comparison function.