This element may enclose either the document title, or a section title. As explained in the documentation for the sect element, this element's start and end tags are usually omitted when specifying a section title.
You may have simple markup within the title, but do be aware that the contents of this element are quite likely to appear in contexts remote from your document, such as a reference in another document, a table of contents, or within a search engine. It is quite likely, therefore, that even this simple markup might be stripped at some point.
( #pcdata
|
em |
strong |
quote |
code |
kbd |
cite |
m |
angle |
foreign) *
title |_(#PCDATA | |__em | |__strong | |__quote | |__code | |__kbd | |__cite | |__m | |__angle | |__foreign)*