sect1 — A top-level section of document
sect1 ::=
addressanchorannotationbibliolistblockquotebridgeheadcalloutlistcautionclasssynopsiscmdsynopsisconstraintdefconstructorsynopsisdestructorsynopsisepigraphequationexamplefieldsynopsisfigureformalparafuncsynopsisglosslisthtml:formimportantindexterm (db.indexterm.endofrange)indexterm (db.indexterm.singular)indexterm (db.indexterm.startofrange)informalequationinformalexampleinformalfigureinformaltable (db.cals.informaltable)informaltable (db.html.informaltable)itemizedlistliterallayoutmediaobjectmethodsynopsismsgsetnoteorderedlistparaprocedureproductionsetprogramlistingprogramlistingcoqandasetremarkrevhistoryscreenscreencoscreenshotsegmentedlistsidebarsimparasimplelistsynopsistable (db.cals.table)table (db.html.table)tasktipvariablelistwarningSect1 is one of the top-level sectioning elements in
a component.  There are three types of sectioning elements in
DocBook:
Explicitly numbered sections, Sect1…Sect5,
which must be properly nested and can only be five levels deep.
Recursive Sections, which are alternative to the numbered
sections and have unbounded depth.
SimpleSects, which are terminal.  SimpleSects can
occur as the “leaf” sections in either recursive sections or any
of the numbered sections, or directly in components.
None of the sectioning elements is allowed to “float” in a component. You can place paragraphs and other block elements before a section, but you cannot place anything after it.
This means that you cannot have content in the Sect1
after the end of a Sect2.  This is consistent with
the DocBook book model, because in a printed book it is usually
impossible for a reader to detect the end of the enclosed
second level section and, therefore, all content after a second
level section appears in that section.
Common attributes and common linking attributes.
Specifies an identifying string for presentation purposes
Identifies the editorial or publication status of the element on which it occurs
The following elements occur in sect1: address, anchor, annotation, bibliography, bibliolist, blockquote, bridgehead, calloutlist, caution, classsynopsis, cmdsynopsis, constraintdef, constructorsynopsis, destructorsynopsis, epigraph, equation, example, fieldsynopsis, figure, formalpara, funcsynopsis, glossary, glosslist, html:form, important, index, indexterm (db.indexterm.endofrange), indexterm (db.indexterm.singular), indexterm (db.indexterm.startofrange), info (db.titleforbidden.info), info (db.titlereq.info), informalequation, informalexample, informalfigure, informaltable (db.cals.informaltable), informaltable (db.html.informaltable), itemizedlist, literallayout, mediaobject, methodsynopsis, msgset, note, orderedlist, para, procedure, productionset, programlisting, programlistingco, qandaset, remark, revhistory, screen, screenco, screenshot, sect2, segmentedlist, sidebar, simpara, simplelist, simplesect, subtitle, synopsis, table (db.cals.table), table (db.html.table), task, tip, title, titleabbrev, toc, variablelist, warning.