Class and sequence diagrams work together to allow precise modeling Your email has been sent UML is used as a representation of the Java programming language. Using sample class and sequence ...

From a tiny sample of tissue no larger than a grain of sand, scientists have come within reach of a goal once thought unattainable: building a complete functional wiring diagram of a portion of ...

It would be worthwhile to label your rack in the same manner. My Visio rack diagram contains a sample 34U rack with objects from the custom stencil, as well as some Visio default items.