[Zope] ZCatalog capabilities
Dieter Maurer
dieter at handshake.de
Tue Nov 11 14:24:54 EST 2003
nwingfield at che-llp.com wrote at 2003-11-10 17:51 -0500:
> I'm working on an enterprise document management system that needs highly
> flexible metadata structures - based on dynamic, customizable document
> types - and lightning fast queries on this metadata. The idea is to use
> the metadata associated with each document to dynamically generate flexible
> navigation routes and search interfaces (think iTunes or iPod) for any
> document type. Question is: is ZCatalog robust enough for this purpose or
> will I be better served by a relational data model? Up to this point, I
> have relied on Zope's object database, but I'm afraid that ZCatalogs are
> just not sophisticated enough to do the job. I would appreciate input from
> anyone with real world experience in ZCatalogs.
The ZCatalog has very limited search capabilities.
All it provides out of the box is the intersection
of subqueries to a set of indexes.
ZCatalog has a flexible indexing framework and you can
plug in sophisticated indexes. With respect to a single
index, you can have (depending on the index type)
and/or/not/near/synonym/thesaurus/... subqueries.
However, such subqueries can only be combined by intersection.
You do not have union, difference and you do not have things
like joins.
For really complex queries, I would not go for ZCatalog.
--
Dieter
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