On Wed, Feb 15, 2006 at 03:01:52PM +0100, Jeremias Maerki wrote:
> Among other things, I'm currently implementing support for XMP metadata
> as part of my PDF/A-1 work [1]. XMP can consist of elements from a
> number of namespaces which are not necessarily known beforehand,
> especially since you can add arbitrary private extensions to XMP
> metadata. With our current method you get warning messages such as the
> following for unregistered namespaces:
> 
> WARNING: Unknown formatting object http://ns.adobe.com/xap/1.0/^CreateDate

With XMP you may be required to accept any namespace, but you get them
in a well defined subtree. Does that help? Maybe some element may
declare a desired behaviour for its whole subtree?

Simon

-- 
Simon Pepping
home page: http://www.leverkruid.nl

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