sidebar — A portion of a document that is isolated from the main narrative flow.


sidebar ::=


Common attributes and common linking attributes.

Additional attributes:

  • floatstyle

Additional Constraints

  • sidebar must not occur among the children or descendants of sidebar


A sidebar is a short piece of text, rarely longer than a single column or page, that is presented outside the narrative flow of the main text.

Sidebars are often used for digressions or interesting observations that are related, but not directly relevant, to the main text.

Processing expectations

Formatted as a displayed block. Sometimes sidebars are boxed or shaded.

DocBook does not specify the location of the sidebar within the final displayed flow of text. The wrapper may float or remain where it is located.


Common attributes and common linking attributes.

any attribute

Any attribute in any other explicit namespace


Specifies style information to be used when rendering the float


These elements contain sidebar: abstract, acknowledgements, answer, appendix, article, bibliodiv, bibliography, bibliolist, blockquote, callout, calloutlist, caption, caution, chapter, colophon, cover, danger, dedication, dialogue, drama, entry, example, figure, footnote, glossary, glossdef, glossdiv, glosslist, important, index, informalexample, informalfigure, itemizedlist, legalnotice, linegroup, listitem, meta (db.meta.content), note, orderedlist, para, partintro, poetry, preface, procedure, qandadiv, qandaset, question, result, revdescription, section, setindex, sidebar, simplesect, step, taskprerequisites, taskrelated, tasksummary, textobject, tip, toc, variablelist, warning.


The following elements occur in sidebar: address, anchor, bibliolist, blockquote, bridgehead, calloutlist, caution, danger, dialogue, drama, epigraph, equation, example, figure, formalgroup, formalpara, glosslist, important, indexterm (db.indexterm.endofrange), indexterm (db.indexterm.singular), indexterm (db.indexterm.startofrange), info (, info (, informalequation, informalexample, informalfigure, informaltable, itemizedlist, literallayout, mediaobject, note, orderedlist, para, poetry, procedure, qandaset, remark, revhistory, section, sidebar, simpara, simplelist, simplesect, stagedir, subtitle, table, task, tip, title, titleabbrev, variablelist, warning.

See Also

Related elements: abstract, blockquote, epigraph.


 1 |<article xmlns=''>
   |<title>Example sidebar</title>
   |<section><title>An Example Section</title>
 5 | 
   |<para>Some narrative text.
   |<sidebar><title>A Sidebar</title>
10 |<para>Sidebar content.
   |<para>The continuing flow of the narrative text, as if the
15 |sidebar was not present.
20 |</article>