Comment:

Sometimes structured vocabularies contain a special kind of concept that is meant to handle "everything else" in a category, as the default case. Example: "household pet" might have narrower concepts "dog", "cat", and "other household pet". So if I am indexing an article called "How to feed a pet snake", I will want to use the "other household pet" concept, because I want this article to fit into the "household pet" structured vocabulary, but it is not about dogs or about cats.
 
Have you thought about the logic of such default concepts? 

Received on Wednesday, 22 November 2006 19:20:41 UTC