Schema Documentation - Book Profile
version 1.0

The hd element

On this page:

The hd element represents a free-floating heading that is not associated with the hierarchical structure of the document.

The ref attribute may be used to associate an hd element with a construct that it acts as a heading for.

Usage Example

<hd>NOTICE OF THE REMAINS OF A SPECIES OF EQUUS,</hd>
<p>Found associated with the extinct Edentals and Toxodon at Punta Alta, in Bahia Blanca, 
    and with the Mastodon and Toxodon at Santa Fé, in Entre Rios.</p>

Allowed parents

address, annotation, m:annotation-xml, aside (block variant), aside (toc variant), backcover, bibliography, block (block variant), block (toc variant), caption, code, description, entry (bibliography variant), entry (glossary variant), flaps, frontcover, glossary, index, item, d:longdesc, note (block variant), note (phrase variant), object, sel:otherwise, quote, section (section variant), section (verse variant), section (toc variant), section (index variant), section (bibliography variant), section (glossary variant), d:simplifiedLanguageDescription, spine, d:summary, td, th, toc (section variant), toc (block variant), d:tour, verse and sel:when

Allowed children

This element may contain text.

This element may contain the following children: abbr, address, annoref, ssml:break, char, code, d, definition, emph (text variant), emph (phrase variant), expansion, xforms:input, rend:linebreak, ln, m:math, name, note, noteref, num, object (text variant), object (phrase variant), pagebreak, ssml:phoneme (text variant), ssml:phoneme (phrase variant), ssml:prosody (text variant), ssml:prosody (phrase variant), xforms:range, ref, its:ruby, s, ssml:say-as (text variant), ssml:say-as (phrase variant), xforms:secret, sel:select, xforms:select, xforms:select1, span (phrase variant), span (text variant), sub, ssml:sub (text variant), ssml:sub (phrase variant), sup, term, xforms:textarea, time, ssml:token (text variant), ssml:token (phrase variant) and w

Content model and additional requirements

optional attributes: @about, @by, @class, @content, @continuation, @datatype, @desc, @its:dir, @its:translate, @property, @ref, @rel, @resource, @rev, @role, @sel:selid, @ssml:onlangfailure, @typeof, @xml:base, @xml:id, @xml:lang and @xml:space
one or more of
a choice of
either one of the 50 elements: abbr, address, annoref, char, code, d, definition, emph, emph, expansion, its:ruby, ln, m:math, name, note, noteref, num, object, object, pagebreak, ref, rend:linebreak, s, sel:select, span, span, ssml:break, ssml:break, ssml:phoneme, ssml:phoneme, ssml:prosody, ssml:prosody, ssml:say-as, ssml:say-as, ssml:sub, ssml:sub, ssml:token, ssml:token, sub, sup, term, time, w, w, xforms:input, xforms:range, xforms:secret, xforms:select, xforms:select1 or xforms:textarea
or text
end of choice
Note that in addition to restrictions presented in the content model above, use of this element must also respect the following requirement:
  • The hd element must neither be empty nor contain only whitespace.
Such requirements take precedence over any conflicting statements in the content model or in the lists above of allowed children and parents.

Namespace

http://www.daisy.org/ns/z3998/authoring/