>As the CREATE command can create any object including iTIP object.
>It looks to me if the 'schedule' command is redundant. Did I
They can be distinguished by context where you find them in the draft.
The former is used when doing "direct book" kinds of actions. That is, actions where the CU has the rights to directly put entries into a calendar (ie: they become 'booked' on the TARGET calendar). Notice that no METHOD property is in the table in 220.127.116.11 so I suspect that iTIP messages are NOT creatable (but this is an assumption based on interpreting the table).
The latter is used when doing C&S workflow (over iTIP or not). That is, actions where the CU has insufficient rights to directly put entries into a calendar and must rely on the CU associated w/each TARGET to take action on the entry.