xml-dev - Re: xpointer - just a location mechanism?

["Frank Boumphrey" <bckman@ix.netcom.com>]

> So, does that mean that if I want to use the xLink embed capability then
> I must necessarily use the 'to' facility in my xpointer?

Well actually the xpath language returns not the starting point of the
insert, but the node object desribed by the expression itself, so if you do
not use the 'to' keyword, just the node described by xpath should be
embedded. The 'to' key word gives us a way to embed a document fragment
extending across several nodes.

Frank

Certainly the to key word is the way
----- Original Message -----
From: Roger L. Costello <costello@mitre.org>
To: <xml-dev@ic.ac.uk>
Sent: Thursday, December 16, 1999 1:31 PM
Subject: Re: xpointer - just a location mechanism?


> Frank Boumphrey wrote:
> >
> > XPointer uses the 'to' keyword to isolate out a section of the document
eg
> > someurl.xml#id1 to id2.
> >
>
> So, does that mean that if I want to use the xLink embed capability then
> I must necessarily use the 'to' facility in my xpointer?  Is it an error
> if I don't use the 'to' facility?  The 'to' xpointer facility is tied to
> the embed xLink capability?  /Roger
>
> > Frank
> > ----- Original Message -----
> > From: Roger L. Costello <costello@mitre.org>
> > To: <xml-dev@ic.ac.uk>
> > Sent: Thursday, December 16, 1999 11:34 AM
> > Subject: xpointer - just a location mechanism?
> >
> > > Hi Folks,
> > >
> > > I am making my way through the latest xpointer spec.  I may be missing
> > > something (I am not finished reading it) but it appears that the spec
> > > does not support the xLink capability of embedding[1] a portion of an
> > > XML document into the currently active document.  Consider this simple
> > > xLink with a xpointer:
> > >
> > > <xlink:simple
> > >
href="http://www.somewhere.com/BookCatalogue.xml#xpointer(/Book[1])"
> > >     show="parsed"/>
> > >
> > > This hyperlink should result in extracting out of BookCatalogue.xml
the
> > > subtree referenced by the first Book element, and embedding it into
the
> > > current active document.  (This is my understanding of how this should
> > > work.  Please correct me if I am in error.)
> > >
> > > The xpointer spec states that an XPointer is simply a location
> > > mechanism.  In section 2.4 it states:
> > >
> > > "XPointers are not a general query mechanism, they are a specification
> > > of document locations."
> > >
> > > I read this as saying "an xpointer defines how to move a cursor around
> > > in an XML document.  It does not describe what a location means in
terms
> > > of nodes (or strings) being referenced."
> > >
> > > If the spec doesn't describe what the movement of a cursor to a
location
> > > means in terms of node lists (or strings) then how is it going to
> > > support the xLink embed mechanism?  /Roger
> > >
> > >
> > > [1] From the xLink spec: "The parsed option (of the show attribute),
> > > relating directly to the XML concept of a parsed entity, indicates
that
> > > the content should be integrated into the document from which the link
> > > was actuated."
> > >
> > >
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