Machines or systems downstream the Compressed Air System that use the compressed air require data on the condition of the compressed air. These conditions are provided at one or more Customer Distribution Points, depending on the concrete Compressed Air System setup. When modeling a Compressed Air System, the Customer Distribution Points shall be described as such. This can be done using external documentation, but it is recommended to use the Description Attribute of the Node that serves as the output of the Compressed Air System. Common examples of Customer Distribution Points are presented in chapter 6.3 Airnet Examples.