Can categories be anything the producer wants them to be, or must
they
be in a predefined list? If the latter, where can I find the list?
Unlike Karl, I don't care if this list is RDF/XML, N3, XHTML, or YAML.
But I would prefer that it be available via http: instead of itms:.
I second Sam Ruby for http.
For the format, you have to decide, but think about the I18N
problems :) For example it's often a mess in my iTunes because of
categories repeating in French and English but with different names.
Here lies one possible advantage for the RDF format. Easily
extensible. Though if we could have a system which met a list of
predefined requirements that would be great.
Maybe let's define the category list requirements, and we could see
what would be the most practical in terms of format.
But http definitely, creating new scheme is bad :)))
Read the chapter "2.4. URI Schemes", it's short and clear.
[[[
Good practice: Reuse URI schemes
A specification SHOULD reuse an existing URI scheme (rather than
create a new one) when it provides the desired properties of
identifiers and their relation to resources.
]]] - http://www.w3.org/TR/webarch/#URI-scheme
