[xml] make XPointer( id(XX) ) and C14n work without DTD

[Andrew Fan <Andrew Fan Sun Com>]

Hi,

I have a xml file like,
---------
<test>
<content Id="target">
   Hello, World!
</content>
...............
<Reference URI="#target">
</Reference>
</signtest>
-------------

And I parsed it as DOM tree and want to use XPointer( id( "target" ) ) 
to get the content. Because of the absence of DTD, I have to hack the 
DOM with "xmlAddID", which make the XPointer work.  And then, I want to 
make a C14n transform over the DOM, I can not get the correct result. 
What alse must I do in order to get the correct C14n?

Thanks,
Andrew Fan