IndexedCatalog is an extension to the Zope Object Database (ZODB) that makes
object retrieval easier and faster. This is accomplished by indexing all fields
by type and by a query language. It supports foreign and local subobjects and
date queries. IndexedCatalog does not require any additional extensions apart
from the ZODB, and it is made for applications that use StandaloneZODB and not Zope.