If you're looking for a somewhat decent reference, here's one for Perl RegExps:

Perl Regular Expressions

UltraEdit also has some docs on it in their help files. Here's an example:

<BLOCKQUOTE><font size="-1">quote:</font><HR>
Regular Expressions (Unix Syntax):

Symbol Function
\ Marks the next character as a special character. "n" matches the character "n". "\n" matches a linefeed or newline character.
^ Matches/anchors the beginning of line.
$ Matches/anchors the end of line.
* Matches the preceding character zero or more times.
+ Matches the preceding character one or more times.
. Matches any single character except a newline character.
(expression) Brackets or tags an expression to use in the replace command.A regular expression may have up to 9 tagged expressions, numbered according to their order in the regular expression.The corresponding replacement expression is \x, for x in the range 1-9. Example: If (h.*o) (f.*s) matches "hello folks", \2 \1 would replace it with "folks hello".
[xyz] A character set. Matches any characters between brackets.
[^xyz] A negative character set. Matches any characters NOT between brackets.
\d Matches a digit character. Equivalent to [0-9].
\D Matches a nondigit character. Equivalent to [^0-9].
\f Matches a form-feed character.
\n Matches a linefeed character.
\r Matches a carriage return character.
\s Matches any white space including space, tab, form-feed, etc but not newline.
\S Matches any nonwhite space character but not newline.
\t Matches a tab character.
\v Matches a vertical tab character.
\w Matches any word character including underscore.
\W Matches any nonword character.
Note - ^ refers to the character '^' NOT Control Key + value.

Examples:
m.n matches "man", "men", "min" but not "moon".

Te+st matches "test", "teest", "teeeest" etc. BUT NOT "tst".

Te*st matches "test", "teest", "teeeest" etc. AND "tst".

[aeiou] matches every lowercase vowel
[,.?] matches a literal ",", "." or "?".
[0-9, a-z] matches any digit, or lowercase letter
[^0-9] matches any character except a digit (^ means NOT the following)

You may search for an expression A or B as follow:

"(John|Tom)"


This will search for an occurrence of John or Tom. There should be nothing between the two expressions.

You may combine A or B and C or D in the same search as follows:

"(John|Tom)(Smith|Jones)"


This will search for John or Tom followed by Smith or Jones.
<HR></BLOCKQUOTE>


hth,
Deep (just a guy)

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