Join MDN and developers like you at Mozilla's View Source conference, 12-14 September in Berlin, Germany. Learn more at

Type: string
For XML queries, an XPath expression which returns results. Any namespace prefixes declared on the element may be used within the expression.

Document Tags and Contributors

 Contributors to this page: Sheppy,, Marsf, Enn, Ptak82
 Last updated by: Sheppy,