Definicja regular expression

A regular expression is a pattern of literal- and special characters that characterize a string. When regular expressions are used in a text search, then you are interested in one or more occurrences of the string represented by the expression. The search using a regular expression is more powerful than searching for a simple string because the regular expression stands for a (potentially endless) number of strings that are searched for in parallel. As of Release 7.0, regular expressions can be used in ABAP in the FIND and REPLACE statements, the search-, subfield-, replace- and predicate functions, as well as in the CL_ABAP_REGEX and CL_ABAP_MATCHER classes.