|Date||Mon, 28 Jul 2003 10:46:45 +1200|
|Subject||Re: [greenstone-devel] Classifiers and metadata/Organizing Documents|
AZCompactList does this - it groups things with the same metadata values into a folder in the list, just like you want. documents that do not have common metadata values will appear in the top list.
classify AZCompactList -metadata Subject
it has other options as well, run perl -s classinfo.pl AZCompactList to see them.
the other alternative is to use a Hierarchy classifier, but here you have to provide the hierarchy.
hope this achieves what you are after.