.

(Period) Any single character.

b.d matches “bed” and “bad” but not “bead”.

*

None or more of the preceding characters or expressions.

a*ck matches “luck”, “back” and “barrack” but not “brace”.

+

At least one or more of the preceding characters or expressions.

a+ck matches “back” and “barracks” but not “luck”.

^

The beginning of a line.

^luck matches the word “luck” only when it appears as the first set of characters in a line of the editor.

$

The end of a line.

luck$ matches the word “luck” only when it appears as the last set of characters possible at the end of a line in the editor.

< 

The beginning of a word.

<ba matches words such as “bad” and “back” that begin with the letters “ba”.

> 

The end of a word.

ck> matches words such as “luck” and “back” that end with the letters “ck”.

( ) or { }

Any sequence of characters between the braces.

(very)+good finds “verygood”, “veryverygood”and so on. Note that it is not found “vgood”, “ygood”, or “vergood” because the sequence “very” is not in any of those strings.

|

Matches either the expression before or the one after the OR symbol (|). Mostly used in a group.

(sun|mon)day matches “sunday” and “monday”.

[ ]

Any of the characters contained in the brackets, or any of the ASCII range of characters separated by a hyphen (-).

b[aeiou]d matches bad, bed, bid, bod, and bud.

r[eo]+d matches red, rod, reed, rood, reod and roed.

x[0-9] matches x0, x1, x2, and so on.

[ ^ ]

Any character except this following the caret (^) character in the brackets, or any of the ASCII range of characters separated by a hyphen (-).

x[^0-9] matches xa, xb, xc, and so on, but not x0, x1, x2, and so on.

:b

Any white-space character. The :b finds tabs and spaces.

Good:bday matches the phrase "Good day" in text but not Goodday

:z

Any unsigned decimal integer.

:z matches any integer, such as "2", "567", "99" etc. but not “luck”.

Equivalent to-  [0 – 9]+.

:i

Any LDL+ identifier.

:i matches any LDL+ identifier like “amount1”, “amount_$” etc. but not “1amount”.

Equivalent to- [a-zA-Z_$][a-zA-Z0-9_$]*

:q

Any quoted string.

:q matches "luck" and 'luck' but not the 't of don't.

Equivalent to- ((\"[^\"]*\")|('[^']*')).

\

Removes the pattern match characteristic in the Find What text box from the special characters listed above.

100$ matches 100 at the end of a line, but 100\$ matches the character string 100$ anywhere on a line.