Do we have to be exhaustive in the various options on getting to manifests?

[iherman]

The document contains a description on how the various manifests can be retrieved (and subsequently combined, although see issue #6). Is this description in the spec exhaustive, or are implementations allowed to do more? Does this description defines the minimal alternatives?

[rdeltour]

IMO we don't need to be exhaustive in the Note. However, I would expect a Rec to be exhaustive, and even to mandate some options and discard others. In other words, we said the Note should not make assumption on the implementation details; a Rec will hopefully define the technical solution.