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   Pluggable canonical XML

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  • To: XML Developers List <xml-dev@lists.xml.org>
  • Subject: Pluggable canonical XML
  • From: Elliotte Harold <elharo@metalab.unc.edu>
  • Date: Tue, 26 Jul 2005 11:51:23 -0400
  • User-agent: Mozilla Thunderbird 1.0+ (Macintosh/20050712)

The canonical XML specification allows for different algorithms each 
identified by a URI. There are certain standard algorithms such as 
http://www.w3.org/2001/10/xml-exc-c14n# and 
http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments (Truth be 
told, this doesn't seem to have been part of the original vision of 
canonical XML, but was invented by the DSIG and Encryption folks; and it 
seems to have been adopted with relatively little trouble.)

Recently I've encountered a need for some special purpose algorithms. 
For instance http://www.elharo.com/c14n/MyPrivateAlgorithm  or 
http://www.elharo.com/c14n/MyPrivateAlgorithm#IgnoreWhiteSpace

Has anyone written any sort of canonicalizer that is pluggable in any 
way? i.e. that allows the user to extend it with new methods? That is 
not just limited to preconceived canonicalization methods? I'm not sure 
what such a thing would look like. I might experiment with something in 
XOM, which already supports the four common methods; but I thought I'd 
check first to see if anyone else had thought about this and made any 
progress.

-- 
´╗┐Elliotte Rusty Harold  elharo@metalab.unc.edu
XML in a Nutshell 3rd Edition Just Published!
http://www.cafeconleche.org/books/xian3/
http://www.amazon.com/exec/obidos/ISBN=0596007647/cafeaulaitA/ref=nosim




 

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