Hi, I've got an XML doc that looks like this: <?xml version="1.0" ?> <EXAMPLE_COMMIT_NOTICE xmlns="http://example.com/services/b2b" xmlns:example="http://example.com/services/b2b"> <Partner_ID>abcdef</Partner_ID> <File_Name>abcdef</File_Name> <Transmission_Date>abcdef</Transmission_Date> <Commit_Notice_Detail> <Order_Number>abcdef</Order_Number> <Partner_Web_Order_Number>abcdef</Partner_Web_Order_Number> <Line_Number>abcdef</Line_Number> <Product_ID>abcdef</Product_ID> <Quantity_Committed>abcdef</Quantity_Committed> <Committed_Ship_Date>abcdef</Committed_Ship_Date> </Commit_Notice_Detail> </EXAMPLE_COMMIT_NOTICE> When editing in the Oxygen XML, if I choose the XPath Expression evaluator and enter: /example:EXAMPLE_COMMIT_NOTICE/example:Commit_Notice_Detail/example:Order_Number then I get an error dialog back from the oXygen plugin: "Exception ro.sync.goto.do Prefix must resolve to a namespace: example" despite the fact that the example prefix is correctly bound to a namespace. I've tried various tricks to get an XPath query that can find elements in this document but nothing will work. I've dropping the proxy of the default namespace and trying /:EXAMPLE_COMMIT_NOTICE/:Commit_Notice_Detail/:Order_Number but it gives the same erri (with nothing after the 'Prefix must resolve to a namespace: ' message. Note, if I do something like: <?xml version="1.0" ?> <EXAMPLE_COMMIT_NOTICE xmlns="http://example.com/services/b2b" xmlns:example="http://example.com/services/b2b"> <Partner_ID>abcdef</Partner_ID> <File_Name>abcdef</File_Name> <Transmission_Date>abcdef</Transmission_Date> <Commit_Notice_Detail xmlns=""> ^^^^^^^^ <Order_Number>abcdef</Order_Number> <Partner_Web_Order_Number>abcdef</Partner_Web_Order_Number> <Line_Number>abcdef</Line_Number> <Product_ID>abcdef</Product_ID> <Quantity_Committed>abcdef</Quantity_Committed> <Committed_Ship_Date>abcdef</Committed_Ship_Date> </Commit_Notice_Detail> </EXAMPLE_COMMIT_NOTICE> and then use a query string of '//Commit_Notice_Detail' it correctly returns '/EXAMPLE_COMMIT_NOTICE[1]/Commit_Notice_Detail[1]' However, that's of no use to me - all of the elements in the document must be from the default or a named namespace. Note the posting on the Oxygen message board at http://www.oxygenxml.com/forum/viewtopic.php?p=21 suggests this approach (proxying the default namespace) should work. Can you let me know what I've missed, or is this a know fault with the plugin (or Xalan)?????