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

[Daniel Veillard <veillard redhat com>]

On Tue, Feb 24, 2004 at 11:28:46AM +0800, Andrew Fan wrote:
> Daniel Veillard wrote:
> 
> >On Mon, Feb 23, 2004 at 06:29:23PM +0800, Andrew Fan wrote:
> > 
> >
> >>Hi,
> >>
> >>I have a xml file like,
> >>---------
> >><test>
> >><content Id="target">
> >>  Hello, World!
> >></content>
> >>...............
> >><Reference URI="#target">
> >></Reference>
> >></test>
> >>-------------
> >>
> >>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?
> >>   
> >>
> >
> > XPointer id() is actually XPath id() and only works if you can assert
> >IDness of an attribute, and that requires a DTD per the spec. Trying to
> >make what you suggest would simply make the library not conformant to the
> >specifications. Sorry that's not possible. Use a different XPointer
> >expression not based on id().
> >
> > 
> >
> Which XPointer expression can I used to express the above URI?  Thanks.

  something like 
     /test/content[ Id='target']
 or  //content[ Id='target']
 or  //*[ Id='target']

 depending on your language target which I have no idea for. You can
find XPath tutorials all over the web,

Daniel

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