Alphabet used in regular expressions

The following symbols make up the alphabet used in regular expressions for ABBYY FlexiCapture data types.

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

Examples

Postal code: [0-9]{6}, sample value 142172
Zip code (USA): [0-9]{5}("-"[0-9]{4}){-1}, sample values 55416, 33701-4313
Income: N{4-8}[,]N{2}, sample values 15000,00, 4499,00
Month in numeric form: ((|"0")[1-9])|("10")|("11")|("12"), sample values 4, 05, 12
Fraction: ("-"|)([0-9]{1-})(|(("."|",")([0-9]{1-}))), sample values 1234,567, 0.99, 100,0, -345.6788903
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