MarkLogic 12 EA 1 Product Documentation
fn:function-availablefn:function-available(
$function-name as xs:string,
[$arity as xs:integer]
) as xs:boolean
Summary
Returns true if and only if there is an XQuery or XSLT function whose name
and optionally arity matches the value of the $function-name and the optional
$arity arguments. This
is an XSLT function, and it is available in both XSLT and XQuery 1.0-ml.
| Parameters |
| function-name |
The $function-name is a string containing a lexical QName. It may be a name
of a builtin-type, type imported using xsl:import-schema, or an extension
type. This parameter is mandatory. The lexical QName is expanded using the
namespace declarations in scope for the expression. If the lexical QName
is unprefixed, then the standard function namespace is used in the expanded
QName.
|
| arity |
If $arity parameter is present, then the function returns true if and only if
the function specified by the first argument has a signature that takes $arity
number of arguments.
|
Example
xquery version "1.0-ml";
fn:function-available("fn:doc")
=>
true
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