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xdmp:function-parameter-name

xdmp:function-parameter-name(
   $function as function(*),
   $position as xs:integer
) as xs:QName

Summary

Returns the name of the parameter at the designated (1-based) position from the given function's signature.

Parameters
$function The function value.
$position The 1-based position of the parameter.

Example

let $fn := fn:empty#1
return
  xdmp:function-parameter-name($fn,1)
=> "arg1"

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