| Function | Description |
| @Begins(string ; sub) | Determines whether a string begins with a substring. |
| @Contains(string ; sub) | Determines whether a string contains a substring. |
| @Contains(string; list) | Determines whether a string contains any substring in a list. |
| @Ends(string ; sub) | Determines whether a string ends with a substring. |
| @FileDir(pathname) | Extracts the directory part of a file path name. |
| @Left(string ; n) | Extracts the leftmost n characters from a string. |
| @Left(string ; sub) | Extracts the leftmost characters from a string up to a substring, searching left to right. |
| @LeftBack (string ; n) | Extracts the leftmost characters from a string up to the nth character from the right. |
| @LeftBack(string ; sub) | Extracts the leftmost characters from a string up to a substring, searching right to left. |
| @Middle(string ; off ; n) | Extracts n characters from a string starting at an offset, searching left to right. |
| @Middle(string ; sub ; n) | Extracts n characters from a string starting at a substring, searching left to right. |
| @Middle(string ; off ; sub) | Extracts characters from a string starting at an offset and stopping at a substring, searching left to right. |
| @Middle(string ; sub ; sub) | Extracts characters from a string starting and stopping at substrings, searching left to right. |
| @MiddleBack(str ; off ; n) | Extracts n characters from a string starting at an offset, searching right to left. |
| @MiddleBack(str ; sub ; n) | Extracts n characters from a string starting at a substring, searching right to left. |
| @MiddleBack(str ; off ; sub) | Extracts characters from a string starting at an offset and stopping at a substring, searching right to left. |
| @MiddleBack(str ; sub ; sub) | Extracts characters from a string starting and stopping at substrings, searching right to left. |
| @ReplaceSubstring(source ; from ; to) | Replaces "from" with "to" in source. If "from" and "to" are lists, replaces corresponding entries in order. |
| @Right(string ; n) | Extracts the rightmost n characters from a string. |
| @Right(string ; sub) | Extracts the rightmost characters from a string up to a substring, searching left to right. |
| @RightBack(string ; n) | Extracts the rightmost characters from a string up to the nth character from the left. |
| @RightBack(string ; sub) | Extracts the rightmost characters from a string up to a substring, searching right to left. |
| @Word(string ; sep ; n) | Extracts word n from a string where words are the text between specified separators. |
| @Word(list ; sep ; n) | Extracts word n from each string in a list where words are the text between specified separators. |