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Spotlight w/ HFS Extended Attributes

Sorry this is more Spotlight related than Cocoa, but seeing that there's no Spotlight mailing list, and my app is Cocoa based - I guess this is the closest I get.

I realize that the new HFS Extended Attributes are not exposed to the higher level API's yet, and also that Spotlight doesn't extract their contents during indexing. However I'm working on a application that would greatly benefit from Spotlight indexing this information. Is it possible to write a Spotlight importer that handles every file with out it interfering with other plug-ins? So that I can extract the extended attributes and add it to the Spotlight store.
If not, any recommendation on an alternative solution? I need to store user specified meta data with any given file. I've considered using the extended attributes and just creating my own index of them, however this means during a search that I would have to perform two searches - one for Spotlight and then from those results form another for my own extended attributes (or vise-versa, which would probably be faster come to think of it).

thanks,
lee
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