SYSML21 — No explanation of how to find what should be listed in UseCase compartments

Three compartments are listed on this page. This only explains how the items should be presented.
use-cases-compartment-contents
include-use-cases-compartment-contents
includes-compartment-contents

Section 7.25 does not explain compartment contents in terms of precisely what, in terms of abstract syntax, for example how to find the item from the UseCaseUsage in which the compartment is presented.
I can assume that include-use-cases-compartment-contents will show the IncludeUseCases owned by a UseCaseUsage/Definition.
I can assume that includes-compartment-contents will show the UseCaseUsages included by the IncludeUseCases owned by a UseCaseUsage/Definition.
What should use-cases-compartment-contents show, unless it is a combination of the above?