>...the path 'Sale/BillID' given within >the 'concat' function may not be a valid path. So my question is, Is >there any way by which we can validate a given XPath expression against >a source document or Is there a way to extract the 'path' strings from >an XPath expression/function so that such validation can be done >separately and the user can be notified of the error appropriately?
Not a complete answer, but something to use: The expression boolean(Sale/BillID) is true if there are any Sale/BillID nodes, as the tree is viewed from the context node, and false otherwise. A good XSLT book would help with questions like these, even if you are working with XPath alone. .................David Marston
