The element-available function tests whether an element, entered as the only string argument of the function, is supported by the XSLT processor. The argument string is evaluated as a QName. Therefore, XSLT elements must have an xsl: prefix and XML Schema elements must have an xs: prefix—since these are the prefixes declared for these namespaces in the underlying XSLT that will be generated for the mapping. The function returns a Boolean.
The element name.