substring-before

Returns that part of the given input string that occurs before the first occurrence of the string given in $operand2

substring-before($arg1 as xs:string?, $arg2 as xs:string?) ➔ xs:string

Arguments
	$arg1	xs:string?	The input string
	$arg2	xs:string?	A substring of the input string; the function returns the part of the input string before this substring
Result		xs:string

substring-before($arg1 as xs:string?, $arg2 as xs:string?, $collation as xs:string) ➔ xs:string

Arguments
	$arg1	xs:string?	The input string
	$arg2	xs:string?	A substring of the input string; the function returns the part of the input string before this substring
	$collation	xs:string	The collation to be used for comparing characters
Result		xs:string

Links to W3C specifications

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

Applies to: XPath 2.0, XSLT 2.0, XQuery 1.0 and later versions

XPath 2.0 Functions and Operators

XPath 3.0 Functions and Operators

Notes on the Saxon implementation

The function is fully implemented according to the W3C specifications.