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calloutlist — A list of Callouts
            
               A CalloutList is a list of annotations or
               descriptions. Each Callout points to the area on a
               Graphic, ProgramListing, or
               Screen that it augments.
               
            
               The areas are identified by coordinates in an an Area or
               AreaSet, or by an explicit CO element.
               
            
These elements contain calloutlist:
                  answer, appendix, article, bibliodiv, bibliography, blockquote, callout, caption, caution, chapter, colophon, constraintdef, dedication, entry, example, footnote, glossary, glossdef, glossdiv, graphicco, highlights, imageobjectco, important, index, informalexample, legalnotice, listitem, msgexplan, msgtext, note, para, partintro, preface, procedure, programlistingco, qandadiv, qandaset, question, refsect1, refsect2, refsect3, refsection, refsynopsisdiv, revdescription, screenco, sect1, sect2, sect3, sect4, sect5, section, setindex, sidebar, simplesect, step, taskprerequisites, taskrelated, tasksummary, td, textobject, th, tip, warning.
               
areaspec, co, coref, graphicco, imageobjectco, itemizedlist, listitem, mediaobjectco, orderedlist, programlistingco, screenco, segmentedlist, simplelist, variablelist.