unparsed-text-available

Determines whether the corresponding call on unparsed-text() with the same arguments would succeed.

unparsed-text-available($href as xs:string?) ➔ xs:boolean

Arguments
	$href	xs:string?	The uri of the text file to be read
Result		xs:boolean

unparsed-text-available($href as xs:string?, $encoding as xs:string) ➔ xs:boolean

Arguments
	$href	xs:string?	The uri of the text file to be read
	$encoding	xs:string	The encoding to be assumed for the text file
Result		xs:boolean

Links to W3C specifications

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

Applies to: XPath 3.0, XSLT 3.0, XQuery 3.0 (if enabled in Saxon: requires Saxon-PE or Saxon-EE)

XPath 3.0 Functions and Operators

XSLT 2.0 Specification

Notes on the Saxon implementation

The current Saxon implementation is not deterministic: if the function is called twice with the same argument, it will read the external file twice, and may return different results if it has changed; the fact that a file is available or unavailable does not guarantee that its status will remain unchanged for the rest of the query or transformation.

>The current implementation is inefficient: if a call on unparsed-text-available() is followed by a call on unparsed-text() to read the same file, the file will be read twice.