Re: Tricky XML application?

steve_marjoribanks wrote:

>
> I am currently doing quite a bit of work on a data exchange format in
> XML. As part of this I need to use XLink and XPointer attributes quite
> frequently as one of the requirements is for the data in the documents
> to be 'linked' to its source. Currently, as far as I'm aware there is
> very little (if any) software/browser support for XPointer.

XPointer is based on the Extended Pointer Notation as defined in the
Guidelines of the Text Encoding Initiative (www.tei-c.org). The only
freely-available implementation I know of is David Megginson's Emacs
psgml-xpointer.el which returns an XPointer for the current node (ie
where the cursor is). See
http://www.oasis-open.org/cover/meggXPointerEmacs.html

> My question is that would it be possible (and if so how difficult) for
> me to write a small application which could use the XPointer stuff.
> ie. you could load an XML document into it and through some sort of
> very simple interface it could say retrieve the source of the required
> data when asked to and display it in another frame for example?

Would this be similar to what xpathtester already does for XPaths?
See http://www.xslt.com/html/xsl-list/2001-12/msg00055.html

See also the FAQ at http://xml.silmaril.ie/authors/links/ where I give
a trivial example.

> What are everyone's views on this? How difficult would it be to write,
> and if not too difficult what language would you recommend writing it
> in, I'm guessing either Java or VB?

VB would be restricted to Microsoft users only and would be strongly
deprecated. Java would have much wider application.

///Peter
--
XML FAQ: http://xml.silmaril.ie/
.

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