No, anyone can add new keywords to a PDF for 'private' use. See
Appendix E "PDF Name Registry" of the PDF Reference. I've added several
new keywords already for PDF/is. They would only be used by 'PDF/is'
compliant devices. None of these extensions violate the basics of the
PDF language, with the exception (possibly) of the proposed banding
issue. But, even so, Adobe can make changes to the language to
accommodate new extensions; it just requires more work on my part and
approval from the 'pdflang' committee.
-Rick
> -----Original Message-----
> From: Yiruo Yang [mailto:yyang at eitc.epson.com]
> Sent: Wednesday, November 20, 2002 10:21 AM
> To: Rick Seeler
> Subject: RE: IFX> New version of PDF/is (PDFax) specification
> is now available.
> Importance: High
>>> Rick,
>> ...
> > Notice the new keyword '/Fis_BandY'. There would also be a keyword
> > '/Fis_BandX' for banding in the other direction.
> >
>> Are these new keywords valid in PDF? If not, the PDF/is won't
> be a subset of PDF. I think it will cause other problems.
>> Thanks,
> Yiruo
>