RE: Match, Dave, 04-17-2007
The [ and ] brackets in a regular expression define a "character class"
by Roger Harris, April 18, 2007 12:39
A "character class" is a specified list of possible single characters that can appear at that position, so "[1ZA]" would mean EITHER a "1", or a "Z" or an "A" in that position, not the literal string "1ZA". For an exact match on a specific character sequence, just put that character sequence directly in the match pattern with no brackets, such as "^1ZA" to match anything beginning with "1ZA" or "^91011" to to match anything beginning with "91011". (Without the ^ at the front, those patterns would match exact substrings anywhere in the input.) An expression like [0-9] in a character class means any character between "0" and "9", and [A-Z] would match any uppercase letter. Please see the Users Guide for more details about match patterns.
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