Re: NSMetadataItem question.
Re: NSMetadataItem question.
- Subject: Re: NSMetadataItem question.
- From: Scott Anguish <email@hidden>
- Date: Sun, 8 May 2005 06:13:27 -0400
On May 8, 2005, at 4:19 AM, Josh Morris wrote:
Hello all,
Apologies if this has been asked before, but is the kMDItemID
metadata attribute always unique, even across all volumes?
I'm assuming you mean kMDItemIdentifier, since kMDItemID isn't a
defined attribute (as far as I know), it certainly isn't in the
headers, or the system Schema.xml
I heard that Spotlight gathers metadata on a per-volume basis, and
since it seems likely that kMDItemID is just a ROWID in a database
(or similar), I'm concerned that I might run into duplicate item
id's across different volumes. This would be bad news for my
program, as it depends on kMDItemID's uniqueness.
Assuming you mean kMDItemIdentifier.. No. It's an identifier
that is supplied by the Spotlight importer. What it is will depend on
the file type. As an example, a mail program could use this to store
a Message-ID. (I'll add this to the doc)
Also, if this and other Spotlight questions would be better handled
on some other list that I don't know about, please let me know.
Thanks!
There isn't currently a Spotlight dedicated list... if you'd
like to see one, file a bug, or mail developer technical support at
Apple (and feel free to cc me)
-Josh Morris
email@hidden
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