| Regular Expressions in UltraEdit |
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| UltraEdit Symbol | UNIX Symbol | Function |
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| % | ^ | Matches/anchors the beginning of line. |
| $ | $ | Matches/anchors the end of line. |
| ? | . | Matches any single character except a newline character. Does not match repeated newlines. |
| * | | Matches any number of occurrences of any character except newline. |
| + | + | Matches one or more of the preceding character/expression. At least one occurrence of the character must be found. Does not match repeated newlines. |
| ++ | * | Matches the preceding character/expression zero or more times. Does not match repeated newlines. |
| ^ | \ | Indicates the next character has a special meaning. "n" on its own matches the character "n". "^n" (UE expressions) or "\n" (UNIX expressions) matches a linefeed or newline character. See examples below. |
| [ ] | [ ] | Matches any single character or range in the brackets. |
| [~xyz] | [^xyz] | A negative character set. Matches any characters NOT between brackets. |
| ^b | \f | Matches a page break/form feed character. |
| ^p | \p | Matches a newline (CR/LF) (paragraph) (DOS Files). |
| ^r | \r | Matches a newline (CR Only) (paragraph) (MAC Files). |
| ^n | \n | Matches a newline (LF Only) (paragraph) (UNIX Files). |
| ^t | \t | Matches a tab character. |
| [0-9] | \d | Matches a digit character. |
| [~0-9] | \D | Matches a non-digit character. |
| [ ^t^b] | \s | Matches any white space including space, tab, form feed, etc., but not newline. |
| [~ ^t^b] | \S | Matches any non-white space character but not newline. |
| | \v | Matches a vertical tab character. |
| [a-z_] | \w | Matches any word character including underscore. |
| [~a-z_] | \W | Matches any non-word character. |
| ^{A^}^{B^} | (A|B) | Matches expression A OR B. |
| ^ | \ | Overrides the following regular expression character. |
| ^(...^) | (...) | 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. |
| ^1 | \1 | Numerical reference to tagged expressions. Text matched with tagged expressions may be used in Replace commands with this format. |
| Note: ^ refers to the character '^' NOT Control Key + value. |
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