What is a multi branch xpath query for finding this?

[ebripeis]

This is my current xpath query:\[code\]//node:Expr_Assign[subNode:var/node:Expr_Variable/subNode:Name/scalar:string='my_chinese_surname' and subNode:expr/node:Scalar_String/subNode:value/scalar:string='Qiu']\[/code\]I'm trying to find it in this xml:\[code\]<?xml version="1.0" encoding="UTF-8"?><AST xmlns:node="http://nikic.github.com/PHPParser/XML/node" xmlns:subNode="http://nikic.github.com/PHPParser/XML/subNode" xmlns:attribute="http://nikic.github.com/PHPParser/XML/attribute" xmlns:scalar="http://nikic.github.com/PHPParser/XML/scalar"> <scalar:array> <node:Expr_Assign> <attribute:startLine> <scalar:int>2</scalar:int> </attribute:startLine> <attribute:endLine> <scalar:int>2</scalar:int> </attribute:endLine> <subNode:var> <node:Expr_Variable> <attribute:startLine> <scalar:int>2</scalar:int> </attribute:startLine> <attribute:endLine> <scalar:int>2</scalar:int> </attribute:endLine> <subNode:name> <scalar:string>my_chinese_surname</scalar:string> </subNode:name> </node:Expr_Variable> </subNode:var> <subNode:expr> <node:Scalar_String> <attribute:startLine> <scalar:int>2</scalar:int> </attribute:startLine> <attribute:endLine> <scalar:int>2</scalar:int> </attribute:endLine> <subNode:value> <scalar:string>Qiu</scalar:string> </subNode:value> </node:Scalar_String> </subNode:expr> </node:Expr_Assign> </scalar:array></AST>\[/code\]It's not currently working. Infact I can't even select the scalar:array.What's wrong with the query?I figured it was namespaces. But I can't register them, the urls are dead? http://nikic.github.com/PHPParser/XML/node this doesn't lead anywhere.