Hello,

Solutions:

a: No, do not keep None values in the catalog
   the current implementation works like this
   you are unable to ask the catalog for objects having None
   properties
b: Yes, keep None values in the catalog
   you can ask the catalog for objects having None properties
c: Let's keep the existing one that does not index None and have an
   AttributeIndexAlsoNone class which will index None values

-- 
Best regards,
 Adam                          mailto:[EMAIL PROTECTED]
--
Quote of the day:
Always borrow money from a pessimist; he doesn't expect to be paid back.

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