+ docstring layoutName() const;
+ /// return the mandatory argument (LaTeX format) only
+ void getArgument(otexstream & os, OutputParams const &) const;
+ /// return the caption text
+ int getCaptionAsPlaintext(odocstream & os, OutputParams const &) const;
+ /// return the caption text as HTML
+ docstring getCaptionAsHTML(XHTMLStream & os, OutputParams const &) const;