Thanks for the links and references! I’ve had those since I first rolled my sleeves up and started working on device handlers though - back when they were 2 huge documents. 
I wasn’t asking what valid values to use for a specific command, but what the values are for the command itself.
For example, the basic command class is 0x20. The next piece of information in the frame is the actual command. The command is always one byte (per 3.2.1.2 of the command class spec. But all you will see in the spec or anywhere is reference to names, ie “BASIC_SET”, or “BASIC_GET”. There is nothing that tells you the decimal equivalent of that named command. So if the frame starts 2001, that’s a basic set. If it starts 2002, it’s a basic get. And 2003 is a basic report. But I know from hacking my way around - I can’s find a reference that says the set command for the basic command class is 01, get is 02, and report is 03. And if I look at a different class, like configuration, the set/get/report numbers are 4/5/6, respectively. So I can’t even infer the values from the spec.
At least I can’t infer them. So…I asked if there is a reference anywhere to that level of specificity. Still haven’t found one.