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   RE: [xml-dev] Well-established uses of processing instructions?

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  • To: "Vladimir Gapeyev" <vgapeyev@seas.upenn.edu>,<xml-dev@lists.xml.org>
  • Subject: RE: [xml-dev] Well-established uses of processing instructions?
  • From: "Dare Obasanjo" <dareo@microsoft.com>
  • Date: Mon, 9 May 2005 14:00:03 -0700
  • Thread-index: AcVUP6pF0TRYkXRXRb220sNkNAPnCAAmglnA
  • Thread-topic: [xml-dev] Well-established uses of processing instructions?

The various Microsoft Office 2003 XML formats such as wordProcessingML
use processing instructions to indicate which application should be used
for opening the file. See

Two wrongs are only the beginning.   

This posting is provided "AS IS" with no warranties, and confers no

> -----Original Message-----
> From: Vladimir Gapeyev [mailto:vgapeyev@seas.upenn.edu] 
> Sent: Sunday, May 08, 2005 7:33 PM
> To: xml-dev@lists.xml.org
> Subject: [xml-dev] Well-established uses of processing instructions?
> I am curious to know to what uses have people put XML 
> processing instructions.  I am more interested in those that 
> have a "community"
> around them (manifesting itself by a de jure or a de facto 
> standard, or multiple applications that understand the PI, or 
> large amount of document instances with unrelated authorship) 
> rather than in made-up samples, however plausible they are.  
> Any pointers?
> After some search, I am aware of just a couple instances:
> (1) http://www.w3.org/TR/xml-stylesheet/ -- W3C 
> Recommendation of 1999 on Associating Style Sheets with XML 
> documents.  How much is this Rec important for non-HTML XML 
> documents?  (For (X)HTML, the <LINK REL="stylesheet"> element 
> appears to be a better solution.)
> (2) It appears Apache project Cocoon-1 used PIs, but Cocoon-2 
> switched to a more flexible model where association between 
> an XML document and a processor is specified by a third, 
> separate, document 
> (http://wiki.apache.org/cocoon/ThePyramidModel?highlight=%28pr
> ocessing%29%7C%28instruction%29).
> Thanks for any help,
> Vladimir
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