[Zope-dev] Testing a ZCatalog index type

Hello, Is there a way to test the type of a ZCatalog index from DTML or Python (eg. TextIndex | FieldIndex | KeywordIndex)? I can loop on "indexes" to get the index names. However, I had a look at the sources and I couldn't find any way to retrieve an index type. It looks like the index type is only used in "addIndex" in Catalog.py when first creating the index. Any hope? Thanks. Alexandre