Selection Set Operators
| Selection Operator | Syntax | Description |
| Union | + selection criteria | Plus sign (+) indicates a set union operation. The result is the combination of previously selected objects and objects selected by the attached selection criteria. |
| Minus | – selection criteria | Minus sign (-) indicates a set minus operation. The result is the previously selected objects without any of the objects selected by the attached selection criteria. |
| Intersection | ^ selection criteria | Caret (^) indicates a set intersection operation. The result is the objects in both the previously selected set of objects and the objects selected by the attached selection criteria. |