Boolean regular expressions allow you to combine regular expressions using the Boolean and, or, and not operators.
| Menu Item | Operator | Definition |
| Boolean And | and | Specifies that the preceding and following regular expressions must both match. |
| Boolean Or | or | Specifies that at least one of the preceding and following regular expressions must match. |
| Boolean Not | not | Specifies that the regular expression following the not must not match. |
Regular and Boolean regular expression operators are available from drop-down menus, or you can enter them directly in the appropriate field. The following table shows examples of Boolean regular expressions.
| Example | Matches | Does Not Match |
la and ia
|
La Vernia and Lelia Lake | Lake Jackson |
ville$ or town$
|
Brownsville and Baytown | Lubbock |
ille$ and not ^[n-z]
|
Brownsville and Kerrville | Pflugerville |