The dd element represents either a description or a span of discourse.
A dd element must have a
start tag.
A
dd element's end tag may be omitted if the
dd element is immediately
followed by another dd element or
a dt element, or if there is no
more content in the parent element.
If a dd element’s parent is a dl element, then the dd element represents the description (or value) part of a term-description (name-value) grouping in a description list.
If a dd element’s parent is a dialog element, then the dd element represents a span of discourse (a quote) in a talker-discourse (speaker-quote) pair in a conversation.