A specification that places one optional name at a higher or lower level than another optional name is not recommended. (name = [aa....aa,bb....bb])

aa....aa: Optional name
bb....bb: Optional name

Description

A specification for placing an optional name at a higher or lower level than another optional name is not recommended.

Action

If it is possible to indicate a specification other than the one for placing an optional name at a higher or lower level than another optional name, revise the specification of the optional name.