Domain and URL Parameter
The domain definition is a child definition to detail screens with an edit type of HTML, and can specify the URLs to which users can navigate or those they should be prevented from viewing. This definition type contains a single attribute of Name, which contains the URL for the domain definition. The parent HTML field then specifies whether all child domain definitions are those that are allowed to be viewed, or those that should be blocked.
The URL parameter is a child definition to detail screen fields with an edit type of HTML, and can specify an argument value to be passed to the URL the field is defined to display. The value for each URL parameter is specified via a rule definition, making the values dynamic.