Thank you for the review. You can use namespaces by entering a JSON string which pair namespace prefixes with namespace URIs. If you enter {"x":"http://www.w3.org/1999/xhtml","y":"http://www.w3.org/2000/svg"} in the Resolver input field, you can use following XPath expressions: //x:div//y:image, //x:a, /y:svg/y:rect