Anyone who has ever used word processing programs has had to face the problem of searching for a text string within the period. Perhaps without knowing it, we came across the pattern matching problem. Pattern matching is a procedure in which you check whether a token sequence has a certain pattern, that is, a combination of characters that respects a certain pattern.
A lexical token, or simply token, is a string with an assigned and thus identified meaning. It is structured as a pair consisting of a token name and an optional token value. The token name is a category of lexical unit.
As for the interpretation of the inputs by a chatbot, pattern matching can be useful for recognizing certain message sets. ...
