selectPath and executeQuery: the result is different, why?

[Guofeng Zhang]

I use easypo sample to study how to use XPath to select XML according to the instruction in conSelectingXMLwithXQueryPathXPath.html   For the following query express,         String pathText =xqNamesapce +  "$this//po:[EMAIL PROTECTED]'ss']";         Customer[] customers = (Customer[])poDoc.selectPath( queryText ) ; I got the following exception: java.lang.RuntimeException: net.sf.saxon.xpath.StaticError: XPath syntax error at char 5 in {$this//po:customer}: Variable $this has not been declared   If I change the express to (replace “$this” with “.”):         String pathText =xqNamesapce +  ".//po:[EMAIL PROTECTED]'ss']"; The code works well.   If I use executeQuery() instead of selectPaht(), I find that I have to use “$$this” or “.” to replace “$this” in the above pathText string, or no result is found. I also find that the return type of the executeQuery() is XmlAnyTypeImpl, instead of CustomerImpl.   I do not know if I configure my runtime environment incorrectly or I misunderstand the content in conSelectingXMLwithXQueryPathXPath.html?   Thanks for your help very much.   Guofeng