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DOM Vs XPath + ancestor : whats the point?

From: "rvj" <md@----------.--->
To: NULL
Date: 8/2/2004 1:11:00 PM
Having spent a day or so trying to understand XPath + ancestor nodesets, to
create a subset of an existing document, I am not overwhelmed by its
usefullness.

I know I can use the XML DOM for this purpose but I thought XPath was
intended to make it simpler!

In the following newgroup newsgroup message it appears the XPATH is unable
to perform what I would have thought are relatively basic filtering
operations on an XML input file.

http://sqljunkies.com/Newsgroups/microsoft.public.dotnet.xml/2004/3/31/13945
1.aspx

While I understand that XSLT exists for transforming documents from one
format to another, surely XPATH should be able to perform what is
effectively a filtering operation ie only retaining the nodes you do want .

 In other words the format of the file does not change - as its just a
subset

***********************************************************

Is this a fault of the XPath spec or the MS node set created?


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