Reading EXIF metadata tags

Question

Is it possible to access EXIF tags by their Tag Name or their Tag ID in vendor-specific Maker Notes from a Bridge script? In the Bridge DOM, metadata fields are accessed via two names, the namespace's name and then the tag's name within that namespace. But what's the namespace for Maker Notes?
Specifically, I'd like to read out the LensID tag (tag id = 0x010C) of the Minolta Maker Notes using JavaScript. It's an integer number. So I'd use "LensID" as the tag name ... but what's the proper namespace? By the way, this is
not the same as the aux:Lens tag in the http://ns.adobe.com/exif/1.0/aux/ namespace.
And while we're at it: Who defines those weird namespaces in the first place? Is there an overview somewhere which namespaces are known to Bridge and what's inside each?
-- Olaf

Answer 1

No, accessing EXIF tags by Tag ID is not possible with Bridge's built-in scripting.
I'm not sure what's "weird" about the namespace URIs, but for more information about them, check out the XMP Specification. You may also want to ask these questions on the XMP developer forum. You can find both here:
http://www.adobe.com/devnet/xmp/
-David Franzen
Adobe Bridge Quality Engineer
Adobe Systems, Inc.