Okay, so it looks like they're very focused on storage in the client's browser - I assume that's what they mean by terminal equipment. They don't explicitly m

Okay, so it looks like they're very focused on storage in the client's browser - I assume that's what they mean by terminal equipment. They don't explicitly mention etag and I would bet that they can't enforce use of etags or last modified time stamps as they're really just a resource identifier. So, if local storage is out of the question, you could store the information server side.