Hello,
Well, every other products on the market support regex expression, not Qlik. Qlikview offers a turnaround based on macros.
According to wikipedia https://en.wikipedia.org/wiki/Regular_expression
A regular expression, regex or regexp[1] (sometimes called a rational expression)[2][3] is a sequence of characters that define a search pattern. Usually such patterns are used by string searching algorithms for "find" or "find and replace" operations on strings, or for input validation. It is a technique developed in theoretical computer science and formal language theory.
Best regards,
Simon
Bi Consultant (Dataviz & Dataprep) @ Business & Decision