fn:is-NaN
Returns true if the argument is the xs:float or
xs:double value NaN.
is-NaN($value as xs:anyAtomicType) ➔ xs:boolean
Arguments | ||||
| $value | xs:anyAtomicType | The input item | |
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 11. Available for all platforms.
Notes on the Saxon implementation
Available since Saxon 13 in XPath 4.0. Available since Saxon 11 provided that syntax extensions are enabled.