fn:exists
Returns true if the given sequence is not empty.
exists($arg as item()*) ➔ xs:boolean
| Arguments | |||
| 
 | $arg | item()* | The input sequence | 
| Result | xs:boolean | ||
Namespace
http://www.w3.org/2005/xpath-functions
Links to W3C specifications
XPath 2.0 Functions and Operators