Sometimes you just want a named place to put a collection of documents.
If you use a document for this then it ends up with all the metadata you have assigned to the other documents, and if there is no need for any notes then you end up with a blank document whose only significance is its name and its position in the tree.
Would it be useful to have a folder type, a document without metadata or body text. Its purpose would be as a place to put child documents. The edit plane could be replaced by a read only list of documents contained within the folder and their attributes (or some of their attributes).
Does anyone else think this would be useful? or would it just be an added complication?