XPath question - get all nodes that exist in all subnodes

[Swanand Mokashi]

Ok here is my XML structure :
<Files>
<File Name="One.txt">
<Client Name="test1">
<Errors>
<OtherErrorIDs>
<OtherErrorID>1</OtherErrorID>
<OtherErrorID>2</OtherErrorID>
<OtherErrorID>4</OtherErrorID>
</OtherErrorIDs>
</Errors>
</Client>
<Client Name="test2">
<Errors>
<OtherErrorIDs>
<OtherErrorID>1</OtherErrorID>
<OtherErrorID>3</OtherErrorID>
<OtherErrorID>5</OtherErrorID>
</OtherErrorIDs>
</Errors>
</Client>
</File>

<File Name="Two.txt">
<Client Name="test1">
<Errors>
<OtherErrorIDs>
<OtherErrorID>1</OtherErrorID>
<OtherErrorID>3</OtherErrorID>
<OtherErrorID>4</OtherErrorID>
</OtherErrorIDs>
</Errors>
</Client>
<Client Name="test2">
<Errors>
<OtherErrorIDs>
<OtherErrorID>2</OtherErrorID>
<OtherErrorID>3</OtherErrorID>
<OtherErrorID>4</OtherErrorID>
</OtherErrorIDs>
</Errors>
</Client>
</File>

Question is how to find the OtherErrorID that is present in all the clients
for a particular file
in the above eg it should return 1 for One.txt and 3 and 4 for Two.txt.

Can anyone point me in the right direction ?

--
Swanand Mokashi
Microsoft Certified Solution Developer (.NET)
Microsoft Certified Application Developer (.NET)
http://www.swanandmokashi.com/
http://www.swanandmokashi.com/HomePage/WebServices/
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[Oleg Tkachenko [MVP]]

Swanand Mokashi wrote:

Question is how to find the OtherErrorID that is present in all the clients
for a particular file
in the above eg it should return 1 for One.txt and 3 and 4 for Two.txt.

I'm not sure it can be done in pure XPath 1.0. XSLT - easily.

--
Oleg Tkachenko [XML MVP]
http://blog.tkachenko.com