| Function | Description and Usage |
| @Compare | Compares two lists pair-wise. |
| @Length (string) | Returns the length of a string in characters. |
| @Length(stringlist) | Returns the length of each element of a string list in characters. |
| @Like | Uses _ (underline) to match any single character and % (percent sign) to match any sequence of characters in accordance with ANSI standard X3.135-1992. |
| @Like (string ; pattern) | Determines whether two strings match. Conforms to ANSI SQL standard. |
| @Like(string ; pattern ; esc) | Same as above with an escape character. |
| @Matches | Uses ? to match any single character and * to match any sequence of characters, plus a number of other wildcards. @Matches uses \ as an escape character. |
| @Matches (string ; pattern) | Determines whether two strings match. Wildcards can be used to expand the scope of the comparison. |