The Resource Picker lets you specify what resource to configure. Resource Picker Pick a resource from the drop-down list for configuration. Click Wildcard to configure files with a specific extension. In many parts of the server configuration, you specify wildcard patterns to represent one or more items to configure. For example, to restrict access, you specify a wildcard pattern that matches all of the clients who should get access.
Wildcard patterns use special characters.
This is useful in or expressions.