Parameters
You can replace the constant value of your Expression item with a parameter.
To get started, Specify an expression item parameter.
A parameter doesn't add any new functionality to a filter. Rather, it lets you easily re-use the same filter for certain purposes:
To reuse the same filter in multiple Roles that have similar inclusion criteria
To use a filter as the Role Member Filter in Role generators
These are currently the only two use cases for parameterized expression items.
A parameter's default value can be a value you specify manually, or it can be a variable. See Variables.
Note
The default parameter value is merely a placeholder during filter configuration, for the sake of previewing the filter results. The default value does not do anything else. When you use a parameterized filter in one of the above use cases, you will always override the default value.