fn:starts-with-subsequence

Determines whether one sequence starts with another, using a supplied callback function to compare items.

starts-with-subsequence($input as item()*, $subsequence as item()*, $compare as (fn(item(), item()) as xs:boolean?)?:=fn:deep-equal#2) ➔ xs:boolean

Arguments
	$input	item()*		The input sequence
	$subsequence	item()*		The subsequence to check for
	$compare	(fn(item(), item()) as xs:boolean?)?	:= fn:deep-equal#2	A comparison function
Result		xs:boolean

Namespace

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

Links to W3C specifications

XPath 4.0 Functions and Operators

Saxon availability

Available in XPath 4.0, XSLT 4.0, and XQuery 4.0. Requires Saxon-PE or Saxon-EE. Implemented since Saxon 13. Available for all platforms.

Notes on the Saxon implementation

Available since Saxon 13 in XPath 4.0. Available since Saxon 12.0 under the previous name fn:starts-with-sequence provided that syntax extensions are enabled.