More about expansions

Node may contain arbitrarily many section references.

No node may contain more than one @others directive.

The expansion of a section reference is the expansion of the body of the section definition node. That expansion may include expansions of other references appearing in that node.

The expansion of an @others directive is the expansion of all descendant nodes that are not section definition nodes.

No node is ever included in the expansion of more than one @other directive. If several ancestors contain @others directives, the @others directive in the nearest ancestor applies.