dotnet xml: Hi, im trying to use the Xpath function "reverse" with an XmlTextReader.

Im not sure if i need to add a namespace to reference this function or
what, if so whats the address of the namespace. Can anyone give me an
idea where i am going wrong here?

So far....

Dim strXmlFeedUrl As String = server.mappath("test.xml")
Dim reader As XmlTextReader = New XmlTextReader(strXmlFeedUrl)
Dim xmlDoc = New XmlDocument
xmlDoc.Load(reader)
Dim urlArticleNodes As XmlNodeList =
xmlDoc.SelectNodes("reverse(/Articles/Article)")

Im getting the error...

"Namespace Manager or XsltContext needed. This query has a prefix,
variable, or user-defined function."

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XPath 1.0 does not define any such function of that name:
<http://www.w3.org/TR/xpath#corelib>
..NET 1.x and 2.0 only supports XPath 1.0 and a few Microsoft extensions,
those for .NET 2.0 are listed here:
<http://msdn2.microsoft.com/en-us/library/ms256138(en-US,VS.80).aspx>


I guess you have been fooled by someone documentating XPath 2.0
functionality
<http://www.w3.org/TR/xquery-operators/#func-reverse>
without making it clear that the version is XPath 2.0 and that XPath 2.0
is not even a W3C recommendation (read: standard) but only on its way to
standardization.
--

Martin Honnen --- MVP XML

Thanks for pointing that Martin. Basically i am looking to order the
nodes i am selecting in the reverse order they appear in the document.

I would not be ordering by any particular node or attribute, just the
reverse of the order in the document.

eg: "/Articles/Article" in reverse order

Does anyone know a way to do this?



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