Reference

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.

Extracts the hours component from an xs:time value as an xs:integer in the range 0–23.

Selects elements in the document whose ID attribute value matches the given string or space-separated list of IDs.

Returns the processor's implicit timezone as an xs:dayTimeDuration, used when date/time values have no explicit timezone.

Returns a sequence of 1-based integer positions where a value occurs in a sequence, using value equality.

Returns a new sequence with one or more items inserted at a specified 1-based position, without modifying the original sequence.

Looks up nodes using a named xsl:key index, returning all nodes whose key value matches the given value.

Returns true if the context node's xml:lang attribute matches the given language code, following BCP 47 prefix rules.