Conditionals?, ((Head,HeadAbbrev?, ((((BridgeHead|List|ListContinue|Para)| (Caution|Note|Warning)| (Equation|ExampleBlock|FigureFrame|ParaNoWrap|LabeledList| LabeledListTight|LabeledListWide|LabeledListWideTight| SyntaxDiagram|Table|ExampleBlockVerbatim))*)), ReferenceSubsection*))