Variadic functions

Variadic functions can be called with a variable number of positional arguments, rather like the concat() function in previous XPath versions.

Saxon 11 implements variadic functions, but only for built-in system functions (not for user-defined functions).

The sequence-variadic functions available include:

• fn:concat()
• fn:codepoints-to-string()
• array:of()
• array:members()