xpointer and xpath

["Pawson, David" <DPawson@xxxxxxxxxxx>]

part of a requirement I have is

.2.1. Relative position based on elements (e.g., third paragraph after
 heading; heading as ID but paragraphs do not)

xpath does this nicely.
(so does xpointer)

2.1 range based on element IDs (e.g., from ID1 to ID2)

and 

2.3 range based on character offsets (e.g., from character 20 to character
 53 in current element.

xpath 'nearly' does this.

xpointer is meant to do this.

Does anyone know if there are any implementations of xpointer,
ideally linked to an xpath implementation.
And does anyone have a clue as to what sort of interface one
might have to this sort of functionality? Is it 'DOM'ish? SAX'ish?

Any advice appreciated.

Is this off topic Tony?

Regards DaveP


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