In your UG, the edito command make use of the [ ] square brackets for attribute / fields that are not supposed to be optional.

In the above example, I have circled the use of the square brackets, when these fields are not actually optional as stated in the UG.
In your UG, the edito command make use of the [ ] square brackets for attribute / fields that are not supposed to be optional.
In the above example, I have circled the use of the square brackets, when these fields are not actually optional as stated in the UG.