'auto' is not a valid claim format

[ejossev]

I just saw this presentation submission submitted by the wallet:

{"id":"3952984b-1c8c-48a6-a41b-3c2bac72691e","definition_id":"swissid credential","descriptor_map":[{"id":"Identity credential","format":"auto","path":"$","path_nested":{"id":"Identity credential","format":"auto","path":"$.vp.verifiableCredential[0]"}}]}

The DIF Presentation Exchange, chapter 8 and 11 requires the value of the format to be codified by abbreviation tags in separate registry. auto is not there, therefore it is not allowed value.