| Microsoft XML Core Services (MSXML) 5.0 for Microsoft Office - XSLT Reference |  |
| Microsoft XML Core Services (MSXML) 5.0 for Microsoft Office - XSLT Reference | |
Returns True if the function is in the function library.
boolean function-available(string)
The argument must evaluate to a string that is a QName. The QName is expanded into an expanded-name using the namespace declarations in scope for the expression. The function-available function returns True if and only if the expanded-name is the name of a function in the function library. If the expanded-name has a non-null namespace Uniform Resource Identifier (URI), it refers to an extension function; otherwise, it refers to a function defined by XML Path Language (XPath) or XSLT.
The following function call returns True.
function-available("format-number")
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