FIXME: TBD.

Common attributes and common linking attributes.

any attribute

Any attribute in any other explicit namespace

These elements contain poetry: abstract, acknowledgements, answer, appendix, article, bibliodiv, bibliography, bibliolist, blockquote, callout, calloutlist, caption, caution, chapter, colophon, cover, danger, dedication, dialogue, drama, entry, epigraph, example, figure, footnote, glossary, glossdef, glossdiv, glosslist, important, index, informalexample, informalfigure, itemizedlist, legalnotice, linegroup, listitem, meta (db.meta.content), note, orderedlist, 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 poetry: 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 (db.titleforbidden.info), info (db.titleonly.info), informalequation, informalexample, informalfigure, informaltable, itemizedlist, line, linegroup, literallayout, mediaobject, note, orderedlist, para, poetry, procedure, qandaset, remark, revhistory, sidebar, simpara, simplelist, stagedir, table, task, tip, title, titleabbrev, variablelist, warning.