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Re: Well-established uses of processing instructions?


processing instructions xml uses
What is the advantage of using a PI for this?

Jonathan

Dare Obasanjo wrote:

>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
>http://msdn.microsoft.com/library/default.asp?url=/library/en-us/WordXML
>CDK/html/cdktHTMLConverter_HV01113361.asp 
>
>--
>PITHY WORDS OF WISDOM 
>Two wrongs are only the beginning.   
>
>This posting is provided "AS IS" with no warranties, and confers no
>rights.  
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>  
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>>-----Original Message-----
>>From: Vladimir Gapeyev [mailto:vgapeyev@s...] 
>>Sent: Sunday, May 08, 2005 7:33 PM
>>To: xml-dev@l...
>>Subject:  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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