fn:error

Raises an error.

error() ➔ none

There are no arguments
Result		none

error($code as xs:QName) ➔ none

Arguments
	$code	xs:QName	The error code to be returned
Result		none

error($code as xs:QName?, $description as xs:string) ➔ none

Arguments
	$code	xs:QName?	The error code to be returned
	$description	xs:string	An error message
Result		none

error($code as xs:QName?, $description as xs:string, $error-object as item()*) ➔ none

Arguments
	$code	xs:QName?	The error code to be returned
	$description	xs:string	An error message
	$error-object	item()*	An object or value associated with the error
Result		none

Namespace

http://www.w3.org/2005/xpath-functions

Links to W3C specifications

XPath 3.1 Functions and Operators

Notes on the Saxon implementation

Saxon allows the first argument to be an empty sequence, treating this as equivalent to calling fn:error() with no arguments. The error code (local part and namespace URI part) is recorded as part of the exception that's supplied to a user-defined JAXP ErrorListener, or that is returned to the calling application. The value of the $description is available by calling getMessage() on the Exception object. The error details are also available to the catch part of a call when using the XQuery 3.0 or XSLT 3.0 try/catch construct.