address, annoref, annotation (block variant), annotation (phrase variant), m:annotation-xml, aside (block variant), aside (toc variant), block, caption, citation (block variant), citation (phrase variant), d, definition, emph, entry (toc variant), entry (index variant), entry (bibliography variant), entry (glossary variant), expansion, xforms:group, h, hd, hpart, item, xforms:label, ln, d:longdesc, meta, note (block variant), note (phrase variant), noteref, sel:otherwise, p, ssml:phoneme, ssml:prosody, quote (block variant), quote (phrase variant), its:rb, ref, xforms:repeat, its:rt, s, ssml:say-as (phrase variant), ssml:say-as (text variant), d:simplifiedLanguageDescription, span, spine, ssml:sub, d:summary, td, term, th, d:tour and sel:when
This element must not contain text.
This element must contain the following children: xforms:label
http://www.w3.org/2002/xforms/