Missing requirement that non-zero-padded version numbers are prefixed with 'v'

[pwinckles]

Spec:

The sequence of version numbers is the sequence of positive, base-ten integers: 1, 2, 3, etc., and the version directory name is constructed by adding the prefix v.

Validation codes:

• E009: ‘The version number sequence MUST start at 1 and must be continuous without missing integers.’
• E010: ‘The version number sequence must start at 1 and MUST be continuous without missing integers.’
• E011: ‘If zero-padded version directory numbers are used then they must start with the prefix v and then a zero.’

There is no code requiring non-zero-padded version numbers to begin with v. I assume this is because the spec is missing a MUST in the quoted sentence.

[zimeon]

I see my validator gives an E009 if I put a version 1 (as opposed to v1) which isn't covered by the description.

I agree that it would be helpful to have a MUST that all version directory names start with v, and that this is separate from the current E009, E010, E011 (which should perhaps be just about zero padding)

[zimeon]

I propose rewriting the first paragraph of https://ocfl.io/1.0/spec/#version-directories in v1.1 to include an additional MUST, along the lines of @pwinckles' suggest. Change from:

OCFL Object content MUST be stored as a sequence of one or more versions. Each object version is stored in a version directory under the object root. The sequence of version numbers is the sequence of positive, base-ten integers: 1, 2, 3, etc., and the version directory name is constructed by adding the prefix v. The version number sequence MUST start at 1 and MUST be continuous without missing integers.

to

OCFL Object content MUST be stored as a sequence of one or more versions. Each object version is stored in a version directory under the object root. Version directory names MUST be constructed by prepending v to the version number, taken from the sequence of positive, base-ten integers: 1, 2, 3, etc.. The version number sequence MUST start at 1 and MUST be continuous without missing integers.

[awoods]

Just word-smithing here:

OCFL Object content MUST be stored as a sequence of one or more versions. Each object version is stored in a version directory under the object root. Version directory names MUST be constructed by prepending v to the version number. The version number MUST be taken from the sequence of positive, base-ten integers: 1, 2, 3, etc.. The version number sequence MUST start at 1 and MUST be continuous without missing integers.