We need to confirm the final contents of the string to digest. Right now, I think we had settled on these elements:

contents

• name (e.g. chr1)
• length
• topology
• sequence digest (refget digest)

constraints:

• Required: name, length, topology (sequence digest may be left blank)
• topology must be one of: 'linear' or 'circular'
• length must be an integer
• name must be a string, subject to the constraints determined in issue What characters should be allowed in sequence names? #2

Related to this, I initially described this with a JSON-schema that I use in my implementation, but this is a bit more complicated because it encodes the recursion (the fact that the sequence digest element is itself a top-level refgettable element., But, for reference if anyone's interested, it's here:

https://github.com/refgenie/seqcol/blob/master/seqcol/schemas/AnnotatedSequenceList.yaml

Open for discussion.