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indexdiv — A division in an index
indexdiv ::= ((title,subtitle?,titleabbrev?)?, ((itemizedlist|orderedlist|variablelist|simplelist|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|anchor|remark|link|olink|ulink|beginpage)*, (indexentry+|segmentedlist)))
               An IndexDiv identifies a section of an Index.
               An index
               might be divided into sections in order to group entries, usually
               alphabetically.
               
            
An index may
               contain any number of IndexEntry or IndexDiv
               elements, but it cannot
               contain a mixture of both at the same level. 
               
            
                  
                  Formal objects and other elements inappropriate for an index will be
                  removed the content that can appear before the first
                  IndexEntry.
                  
               
The following elements occur in indexdiv:
                  address, anchor, beginpage, blockquote, classsynopsis, cmdsynopsis, constructorsynopsis, destructorsynopsis, fieldsynopsis, formalpara, funcsynopsis, graphic, graphicco, indexentry, informalequation, informalexample, informalfigure, informaltable, itemizedlist, link, literallayout, mediaobject, mediaobjectco, methodsynopsis, olink, orderedlist, para, programlisting, programlistingco, remark, screen, screenco, screenshot, segmentedlist, simpara, simplelist, subtitle, synopsis, title, titleabbrev, ulink, variablelist.