Function that can be use to omit duplicate value on a string

Question

I would like to ask if there is a function that can be use to to remove a duplicate value inside a string separated by | simplest possible way. I have below example of the s

Answer 1

Assuming that you can use XSLT 2.0, and assuming that the input looks like

1111-1|1111-1|1111-3|1111-4|1111-5|1111-3

you could use the distinct-values and tokenize functions:

And the result will be

1111-1|1111-3|1111-4|1111-5