How to use [strings.split]

The reference page of strings.split has its arguments, constraints and declaration.

Splits a string into multiple strings, where a sequence of characters can be found, removing the original sequence of characters from the resulting node set.

.foo:some input string
strings.split:x:-
   .:' '

The above will result in the following result.

.foo:some input string
strings.split:x:-
   .:some
   .:input
   .:string