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refsynopsisdiv — A syntactic synopsis of the subject of the reference page
refsynopsisdiv ::= (refsynopsisdivinfo?, (title,subtitle?,titleabbrev?)?, (((calloutlist|glosslist|bibliolist|itemizedlist|orderedlist|segmentedlist|simplelist|variablelist|caution|important|note|tip|warning|literallayout|programlisting|programlistingco|screen|screenco|screenshot|synopsis|cmdsynopsis|funcsynopsis|classsynopsis|fieldsynopsis|constructorsynopsis|destructorsynopsis|methodsynopsis|formalpara|para|simpara|address|blockquote|graphic|graphicco|mediaobject|mediaobjectco|informalequation|informalexample|informalfigure|informaltable|equation|example|figure|table|msgset|procedure|sidebar|qandaset|task|productionset|constraintdef|anchor|bridgehead|remark|highlights|abstract|authorblurb|epigraph|indexterm|beginpage)+,refsect2*)| (refsect2+)))
               RefSynopsisDiv contains a syntactic synopsis of 
               the function or command described by the RefEntry.  When
               RefEntrys are used to describe other sorts of things, 
               RefSynopsisDiv should be used for whatever succinct, synopsis
               information seems appropriate.[21]
               
            
                  Formatted as a displayed block. RefSynopsisDiv usually generates a
                  section heading, in the same typographic style as a
                  RefSect1 Title, called “Synopsis.”
                  
               
                  Formatting reference pages may require a fairly sophisticated
                  processing system.  Much of the meta-information about a
                  reference page (its name, type, purpose, title, and
                  classification) is stored in wrappers near the beginning of
                  the RefEntry.
                  
               
Common presentational features, such as titles and running headers, may require data from several of these wrappers plus some generated text. Other formatting often requires that these elements be reordered.
The following elements occur in refsynopsisdiv:
                  abstract, address, anchor, authorblurb, beginpage, bibliolist, blockquote, bridgehead, calloutlist, caution, classsynopsis, cmdsynopsis, constraintdef, constructorsynopsis, destructorsynopsis, epigraph, equation, example, fieldsynopsis, figure, formalpara, funcsynopsis, glosslist, graphic, graphicco, highlights, important, indexterm, informalequation, informalexample, informalfigure, informaltable, itemizedlist, literallayout, mediaobject, mediaobjectco, methodsynopsis, msgset, note, orderedlist, para, procedure, productionset, programlisting, programlistingco, qandaset, refsect2, refsynopsisdivinfo, remark, screen, screenco, screenshot, segmentedlist, sidebar, simpara, simplelist, subtitle, synopsis, table, task, tip, title, titleabbrev, variablelist, warning.
               
arg, cmdsynopsis, group, refnamediv, refsect1, refsect2, refsect3, refsection, sbr, synopfragment, synopfragmentref.
               
            
[21] 
                  In this book, each element of the DTD is described on a reference page,
                  and the RefSynopsisDiv is used for
                  the synopsis at the beginning of each entry.