C2MS12 — Revisit Completion Status in Command Response Message

We have a command request message and a command response message.

There can apparently be multiple responses, each as it progresses through the values of the XTCE-STATUS. These even can include if the command was accepted, is executing and if it was completed at the vehicle. But this would mean that the command service that intercepts the command request message must be able to determine from vehicle TLM each of these states.

It would probably be worth while to revisit this and document more clearly the pattern of use of this item, including the multiple responses, and the expected statuses to produce by the command component service provider.

Additionally, there may be a couple of statuses not covered by XTCE-STATUS, such as VCC checking, and TLM verification (verifying the effected change in the telemetry). The former could fall under either 'invalid' or 'failed', but these aren't really discreet enough. The latter doesn't have any status indicated in this message.