Defining Expression elements
Expression elements allow you to combine other network elements with logical operators to represent complex sets of IP addresses.
Logical Operators in Expressions are resolved in the following order (however, items inside parentheses are evaluated before any items outside parentheses are considered):
- Negations
- Intersections
- Unions
Expression Properties dialog box
Use this dialog box to create expressions. Expression elements combine other network elements (IP addresses) with logical operands.
Option | Definition |
---|---|
Name | The name of the element. |
Comment (Optional) |
A comment for your own reference. |
Category (Optional) |
Includes the element in predefined categories. Click Select to select a category. |
Option | Definition |
---|---|
Expression Composer | |
Add Element | Select this option to select the elements to use in the Expression. |
Union | Includes all IP addresses defined in both elements that the union combines. |
Intersection | Includes only those IP addresses that the two elements that the intersection combines have in common. |
Negation | Includes all IP addresses except those that are defined in the element that follows the negation. |
Open Parenthesis | Parentheses group parts of the expression together. Items inside parenthesis are evaluated before they are compared to items outside the parenthesis. |
Close Parenthesis | Parentheses group parts of the expression together. Items inside parenthesis are evaluated before they are compared to items outside the parenthesis. |
Undo | Click to undo the last action you did. |
Redo | Click to redo the last action you did. |