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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