[Zope-dev] NOT operator in Unindex.

Hi, I've been hacking FieldIndex and KeywordIndex to allow it to take the operator not to exclude object that matches from the result. As it seems to me it would be possible to patch the Unindex with the changes I've made. Is this something that could be added to the core? Examples of special not-enabled indexes: http://zope.org/Members/Colliberty/Easy%20Pieces/EasyIndexes/EasyIndexes-0-0...