Simplify the description of Collections in Section 5
The existing description is too complicated and can be simplified.
(replace the existing Section 5.1 to the following.. without the Collection illustrations)
The APP groups resources into "Collections", which are analogous to folders or directories found in a file system with the exception that Collections may not contain other Collections.
The members of a Collection are ordered according to the time at which each resource was created or last updated with the most recently updated members appearing at the beginning of the collection. New members of the collection are added by POSTing an appropriate representation to the URI of the Collection resource.
There are two kinds of Collections: Entry and Generic. In Entry Collections, all members of the collection MUST be Atom Entries Documents. Generic Collections MAY contain members of any media type.