I am using the following xml library and language.
XML Library: MSXML 3.0
Langguae used: C

"sai" wrote:

> I have the following xml files.
> 
> xml1:
> 	<?xml version=\"1.0\"?>
> 	<presence xmlns=\"urn:ietf:params:xml:ns:pidf\" 
> 				xmlns:ex=\"urn:ietf:params:xml:ns:pidf:ex\" >
> 	<tuple id='xyz'>
> 	<status><basic>online</basic><ex:ex>busy</ex:ex></status>
> 	</tuple>
> 	<tuple id='xyz1'>
> 	<status><basic>offline</basic></status>
> 	</tuple>
> 	</presence>
> xml2:
>  	<?xml version=\"1.0\"?>
> 	<tns:presence xmlns:tns=\"urn:ietf:params:xml:ns:pidf\" 
> 			xmlns:ex=\"urn:ietf:params:xml:ns:pidf:ex\" >
> 	<tuple id='xyz'>
> 	<status><basic>online</basic><ex:ex>busy</ex:ex></status>
> 	</tuple>
> 	<tuple id='xyz1'>
> 	<status><basic>offline</basic></status>
> 	</tuple>
> 	</tns:presence> 
> 
> 	1. If I use the "xml1" xml file and execute the following XPath query 
> "//tuple",  I got the response as 0 nodes matched	
> 	2: If I use the "xml2" file and execute the same XPath query as above, then 
> I got the response as 2 nodes matched.
> 	
> 	Q1. I do not see any difference in the xml files and both represent same 
> thing but why do i   get differnet response for the same query. Is is 
> mandatory to write namespace declarations similar to that of in xml file 
> "xml2".
> 	Q2. How should be the XPath query for searching for "ex:ex" element? If I 
> use the following XPath query, I am getting the response as 0 nodes matched.
> 
> 	Thanks in advance for your help.