[
Lists Home |
Date Index |
Thread Index
]
> I have been trying to find a related tool/function for some time (and
> may well have missed it in my search) - an x-path validation tool.
> Such a tool would be capable of validating a given x-path against a
> schema.
Nothing in a schema can make an XPath 1.0 expression invalid. What is
possible is that by examination of a schema you can statically determine
that a particular XPath expression will return an empty node-set. (In fact,
you can do this for some expressions even in the absence of a schema,
examples are "/..", "@comment()", "@x/@y", "item[0]".)
This kind of static analysis is being done by some of the XQuery prototype
implementations; check the XQuery home page http://www.w3.org/XML/Query for
a list of implementations. Similar techniques are also used in the Tamino
database engine: see http://www.tamino.com/
Michael Kay
Software AG
home: Michael.H.Kay@ntlworld.com
work: Michael.Kay@softwareag.com
>
> Is anyone aware of such a tool? It would be a great assistance to my
> non-'expert' x-path writers (and even the expert ones!)
>
> Mike
>
> At 11:47 AM -0500 28/2/02, Daniel Veillard wrote:
> >On Thu, Feb 28, 2002 at 12:58:41PM -0700, Kris Thompson wrote:
> >> I must have missed it but I feel like my searching has
> been complete. I
> >> am looking for a way, using one of the more popular parsers idealy
> >> Xerces, to if given a node in a document return the XPath string
> >> representation of that node. Something like the
> following would be nice
> >>
> >> public static String getXPath(Document doc, Node node)
> >>
> >> where node is the node that I want the XPath
> expression on and doc
> >> is the document for which this node exist.
> >>
> >> If this does not exist in any popular parsers than has
> anyone created
> >> this piece of code for which I could have?
> >
> > Available as:
> > xmlChar * xmlGetNodePath(xmlNodePtr node);
> >
> >in libxml2 (http://xmlsoft.org/)
> > http://xmlsoft.org/html/libxml-tree.html#XMLGETNODEPATH
> >
> >Note of course that there isn't "the" XPath string to select
> that node
> >there is an infinity of those. 2 implementation could return
> different
> >path and both be right.
> >
> >Daniel
> >
> >--
> >Daniel Veillard | Red Hat Network https://rhn.redhat.com/
> >veillard@redhat.com | libxml Gnome XML XSLT toolkit
http://xmlsoft.org/
>http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/
>
>-----------------------------------------------------------------
>The xml-dev list is sponsored by XML.org <http://www.xml.org>, an
>initiative of OASIS <http://www.oasis-open.org>
>
>The list archives are at http://lists.xml.org/archives/xml-dev/
>
>To subscribe or unsubscribe from this list use the subscription
>manager: <http://lists.xml.org/ob/adm.pl>
--
Mike Thanos
Lending Technology Services Pty Ltd
mike_thanos@lendtech.com.au
-----------------------------------------------------------------
The xml-dev list is sponsored by XML.org <http://www.xml.org>, an
initiative of OASIS <http://www.oasis-open.org>
The list archives are at http://lists.xml.org/archives/xml-dev/
To subscribe or unsubscribe from this list use the subscription
manager: <http://lists.xml.org/ob/adm.pl>
|
