diff -r b50e77d23d13 -r fd83cd102325 java/alt2xml-out-xpath/src/cz/frantovo/alt2xml/out/xpath/XPathAction.java
--- a/java/alt2xml-out-xpath/src/cz/frantovo/alt2xml/out/xpath/XPathAction.java	Wed Sep 17 21:06:56 2014 +0200
+++ b/java/alt2xml-out-xpath/src/cz/frantovo/alt2xml/out/xpath/XPathAction.java	Wed Sep 17 21:31:18 2014 +0200
@@ -31,6 +31,7 @@
 import javax.xml.xpath.XPathExpressionException;
 import javax.xml.xpath.XPathFactory;
 import javax.xml.xpath.XPathVariableResolver;
+import org.w3c.dom.Node;
 
 /**
  *
@@ -47,7 +48,6 @@
 	private final XPathFactory xpathFactory;
 	private final XPath xpath;
 	private final String expressionString;
-	private final XPathExpression xpathExpression;
 
 	public XPathAction(ActionContext actionContext) throws OutputActionException {
 		super(actionContext);
@@ -79,12 +79,6 @@
 			xpath.setXPathVariableResolver(variableResolver);
 
 			expressionString = actionData.get(0);
-			try {
-				xpathExpression = xpath.compile(expressionString);
-			} catch (XPathExpressionException e) {
-				throw new OutputActionException("Unable to compile XPath: " + expressionString, e);
-			}
-
 		}
 	}
 
@@ -147,8 +141,19 @@
 
 	@Override
 	public void run(DOMResult domResult) throws OutputActionException {
+		XPathExpression xpathExpression = null;
 		try {
-			String result = xpathExpression.evaluate(domResult.getNode());
+			Node document = domResult.getNode();
+
+			xpath.setNamespaceContext(new DocumentNamespaceContext(document));
+
+			try {
+				xpathExpression = xpath.compile(expressionString);
+			} catch (XPathExpressionException e) {
+				throw new OutputActionException("Unable to compile XPath: " + expressionString, e);
+			}
+
+			String result = xpathExpression.evaluate(document);
 			try (PrintWriter out = new PrintWriter(getActionContext().getOutputStream())) {
 				out.print(result);
 				if (lineBreak) {