Ian Bicking wrote:
Chris McDonough wrote:
I had planned to create another package named repoze.lemonade which:
...
  - Did indexing of content.


What were you thinking of for indexing?  Just catalog stuff?  More general?

I was considering just using zope.index but I haven't really thought much about it yet.

There's been a tension in the opencore stuff with the catalog, mostly that it's easy to setup and use for things, but it doesn't really work for things outside of the ZODB. Or, I guess theoretically you could catalog things not in the ZODB, but it's never happened.

IMO, mostly it's a matter of deciding what "index" and "catalog" means for searching. If you only need full-text search, some indexing systems are totally inappropriate. Likewise, if you only need "field" indexes that match just one particular value, it's sometimes vastly simpler just to come up with your own system based on, e.g. a relational table, than it is to try to use somebody else's "indexer" or "catalog".

That said, there's a real need for cross-system indexing of different kinds. There's text search indexes, but other kinds of more strict indexes also make sense. It would be very handy to have an index that wasn't tied to the ZODB, a database, or anything else. (It could be implemented using the ZODB or a database, of course.)

Xapian seems like a good choice too. It has its own persistence mechanism and reasonable Python bindings (although from experience maybe slightly memory-leaky).

- C
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