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MDSchemaCopyAllAttributes() returning nil

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MDSchemaCopyAllAttributes() returning nil

Subject: MDSchemaCopyAllAttributes() returning nil
From: Dave DeLong <email@hidden>
Date: Wed, 17 Jun 2009 14:53:30 -0600

Hey everyone,

I'm working on a project that works a lot with Spotlight, and we're trying to get a list of all the attributes that Spotlight knows about. We found a really nice function called MDSchemaCopyAllAttributes that returns a CFArrayRef of CFStringRefs, each one corresponding to a spotlight attribute in the schema.

The problem is that when we run this program as root (which we have to), MDSchemaCopyAllAttributes seems to consistently be returning nil. Is this normal behavior? If so, how can we get a list of all Spotlight attributes across an entire machine (and not just the user domain)?

Thanks,

Dave DeLong
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