Reference

Applies a function to each item of a sequence and returns the concatenation of all results.

Formats an xs:date value into a human-readable string using a picture pattern, with optional locale and calendar support.

Formats an xs:dateTime value into a human-readable string using a picture pattern, with optional locale and calendar support.

Formats a number as a string using a picture pattern and an optional named decimal format, following the same rules as Java's DecimalFormat.

Formats an xs:time value into a human-readable string using a picture pattern, with optional locale and calendar support.

Returns the number of arguments (arity) that a function item accepts.

Returns true if the named function is available in the current XSLT processor, supporting portable use of extension functions.

Returns a function item identified by its QName and arity, or the empty sequence if no such function is available.

Returns the QName of a named function item, or the empty sequence if the function is anonymous.

Returns a unique string identifier for a node, guaranteed to be a valid XML name and stable within a single transformation run.