stepalternatives — Alternative steps in a procedure.
stepalternatives element was added to
support the semantics of alternative steps: perform exactly one of the
following steps. The reader is presumably given some criteria for
deciding which one to choose, but the significant difference is that
only one of the steps is performed.
Formatted as a displayed block.
Specifies if the content is required or optional.
Enumerated values: “optional”
The content describes an optional step or steps.
The content describes a required step or steps.