Leonard,

Leonard Rosenthol-3 wrote:
> 
> Or PDF/A, the namespaces are fixed.
> 

Just to be sure... are they really? Especially, is 'xmp'?

According to ISO 19005-1:2005/Cor.1:2007(E) a NOTE 3 is added after note 2
of Subclause 6.7.2 of ISO 19005-1:2005:

“NOTE 3 According to the W3C XML Namespace recommendation [18], namespace
prefixes are shortcuts to namespace URIs. No significance is given to the
prefix itself. Conventional prefixes are used in this subclause for example
purposes. Except where a specific prefix is identified as required (in 6.7.8
and 6.7.11), any prefix can be used.”

The only prefixes identified as required in 6.7.8 and 6.7.11 are
pdfaExtension, pdfaSchema, pdfaProperty, pdfaType, pdfaField in 6.7.8 and
pdfaid in 6.7.11.

Even though 'xmp' is preferred, 'xap' , therefore, still is allowed.

Or do I miss something important here?

Regards,   Michael.

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