Hi Manikandan, Did you do *any* research before posting, like looking in the SKILL documentation for example? The documentation notes the following (in Pattern Matching Functions) for the "rex" functions (e.g. rexMatchp, rexMatchList ...): c Any ordinary character (not a special character listed below) matches itself. . A dot matches any single character \ A backslash when followed by a special character matches that character literally. When followed by one of , (, ), and 1,…,9, it has a special meaning as described below. […] A nonempty string of characters enclosed in square brackets (called a set) matches one of the characters in the set. If the first character in the set is ^, it matches a character not in the set. A shorthand S-E is used to specify a set of characters S up to E, inclusive. The special characters ] and - have no special meaning if they appear as the first character in a set. * A regular expression in the above form, followed by the closure character * matches zero or more occurrences of that form. ... There's more, but not much in comparison to the full regular expression capabilities of the pcre* functions. Hopefully the above gives you some idea of the difference, but maybe also where to look to get a fuller picture. Best regards, Lawrence.
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