>Are the MDBServiceDesc elements siblings (In the original document?)
>if not, they presumavly are not siblings in $services either (depending
>on whether  System.Xml.XPath.XPathNodeIterator is making copies of teh
>selected nodes, or just indexing into the existing tree.

>try adding  xsl:value-of select="generate-id(..)" somewhere in that
>for-each loop (just as a debugging tool, if you get different ids they
>elements have differnt parents so are not siblings

>David

Following up. David was correct in that the .NET architecture was not
providing your typical nodeset to the 
XSLT. The System.Xml.XPath.XPathNodeIterator was essentially providing a
"windowPane" view of the original document 
through the $services parameter. Using the generate-id() showed
this.(Not explicitly mentioned on MSDN that I could find).

Changing preceding-sibling() to preceding() solved the problem.Thanks
for pointing me in the right direction on this one
David.

Ian 

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