> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Regular expressions

> Alphabet used in ABBYY FlexiCapture regular expressions: symbols for letters, numbers, groups, and repetitions, with examples like zip codes.

Use the following symbols to build regular expressions in ABBYY FlexiCapture.

<table width="100%"><tbody><tr><td><p><strong>Name</strong></p></td><td><p><strong>Conventional designation</strong></p></td><td><p><strong>Usage example</strong></p></td></tr><tr><td><p>Any character</p></td><td><p>\*</p></td><td><p>"c"\*"t" – allows such words as cat, cot, etc.</p></td></tr><tr><td><p>Letter</p></td><td><p>C</p></td><td><p>C"ot" – allows such words as Rot, pot, cot, Dot, mot, etc.</p></td></tr><tr><td><p>Uppercase letter</p></td><td><p>A</p></td><td><p>A"ot" – allows such words as Rot, Cot, Mot, Dot, etc.</p></td></tr><tr><td><p>Lowercase letter</p></td><td><p>a</p></td><td><p>a"ot" – allows such words as rot, cot, mot, dot, etc.</p></td></tr><tr><td><p>Letter or number</p></td><td><p>X</p></td><td><p>X – allows any standalone number or letter.</p></td></tr><tr><td><p>Number</p></td><td><p>N</p></td><td><p>N"th" allows such words as 5th, 4th, 6th, etc.</p></td></tr><tr><td><p>String</p></td><td><p>" "</p></td><td><p>"cot"</p></td></tr><tr><td><p>Or</p></td><td><p>|</p></td><td><p>"pl"("o"|"a")"t" – allows words "plot" and "plat".</p></td></tr><tr><td><p>Character from group</p></td><td><p>\[]</p></td><td><p>\[tm]"ot" – allows words "tot" and "mot".</p></td></tr><tr><td><p>Character not from group</p></td><td><p>\[^]</p></td><td><p>\[^t]"ot" – allows words "cot", "lot", etc., but does not allow the word "tot".</p></td></tr><tr><td><p>Space (within group)</p></td><td><p>\s</p></td><td><p>\[A\s] allows only the letter A or a space.</p></td></tr><tr><td><p>Any number of repetitions</p><p>(applies to the expression or subexpression on the left)</p></td><td><p>\{-}</p></td><td><p>\[AB74]\{-} – allows any combinations of characters A, B, 7, 4 of any length.</p></td></tr><tr><td><p>Number of repetitions n</p></td><td><p>\{n}</p></td><td><p>N\{2}"th" allows such words as 25th, 84th, 11th, etc.</p></td></tr><tr><td><p>From n to m repetitions</p></td><td><p>\{n-m}</p></td><td><p>N\{1-3}"th" allows such words as 5th, 84th, 111th, etc.</p></td></tr><tr><td><p>From 0 to n repetitions</p></td><td><p>\{-n}</p></td><td><p>N\{-2}"th" allows such words as 84th, 5th, etc.</p></td></tr><tr><td><p>From n repetitions and more</p></td><td><p>\{n-}</p></td><td><p>N\{2-}"th" allows such words as 25th, 834th, 311th, 34576th, etc.</p></td></tr><tr><td><p>Subexpression</p></td><td><p>()</p></td><td> </td></tr><tr><td><p>Hyphen symbol</p></td><td><p>\[\\-]</p></td><td> </td></tr><tr><td><p>Slash symbol</p></td><td><p>\[\\\\]</p></td><td> </td></tr></tbody></table>

## Examples

1. Postal code: `[0-9]{6}`. A sample value: `142172`.
2. Zip code (USA): `[0-9]{5}("-"[0-9]{4}){-1}`. Sample values: `55416`, `33701-4313`.
3. Income: `N{4-8}[,]N{2}`. Sample values: `15000,00`, `4499,00`.
4. Month in numeric form: `((|"0")[1-9])|("10")|("11")|("12")`. Sample values: `4`, `05`, `12`.
5. Fraction: `("-"|)([0-9]{1-})(|(("."|",")([0-9]{1-})))`. Sample values: `1234,567`, `0.99`, `100,0`, `-345.6788903`.
6. E-mail: `[A-Za-z0-9_]{1-}(("."|"-")[A-Za-z0-9_]{1-}){-3}"@"[A-Za-z0-9_]{1-}(("."|"-")[A-Za-z0-9_]{1-}){-4}"."([A-Za-z]{2-4}|"asia"|"museum"|"travel"|"example"|"localhost"`. Sample values: `support@abbyy.com`, `my-name@company.org.ru`, `info@gallery.museum`.