[Zope-dev] Catalog class--does it support boolean queries?

I am working on a project which requires the use of the Catalog class (versus ZCatalog) for indexing and querying. I have basic full text indexing and querying working correctly but boolean queries seem not to work. Should boolean queries work using Catalog or is it necessary to use ZCatalog instead to get that functionality? This is how I am submitting the query to the Catalog object: results = sdb.cat({"content" : query}) where sdb is a ZODB, cat is the catalog object, and content is the name of the full-text index. query is the query the user typed, which could be "(apples and oranges) or plums" (without the quotes) for instance. Thanks in advance for any assistance anyone can provide on this question.