'''Note:''' this topic is part of the discussions on [[CMDI 1.2]], see [[CMDI 1.2/Header/MdType]].
----
Because the granularity of the existing CMDI files and collections varies a lot (from 1 CMDI = 1 large corpus to 1 CMDI file = single small textfile) it would be handy to indicate that certain CMDI descriptions are about a collection as a whole (e.g. the Corpus Spoken Dutch).

There are several possibilities to cope with this:

 * An extra Header element could be introduced, say {{{<MdCollectionCoverage>collection</MdCollectionCoverage>}}}
   * pro: easy to interprete/understand
 * Use the ResourceProxy hierarchy or the optional IsPartOfList element
   * con: needs a lot of processing, not so robust
 * The collection profile could be taken as a/the indication something is a collection:
   * con: this could create too many collections to be usable (when used with deeply nested collections)
 * Only those collections using a specific collection component could be marked as being a collection.
   * con: idem as above