The note re <dt> has reference to definition and term reversed

[jasonkiss]

The note for the dt element says:

When used within a dl element, the dt element does not necessarily represent the definition for a term. The dfn element should be used to represent a definition.

The dt element never represents a definition. It can represent a term with a definition. Similarly, the dfn element never represents a definition, but rather an instance of a term with a definition.

Recommended changes to the note:

When used within a dl element, the dt element does not necessarily represent a term being defined. The dfn element should be used to represent a term being defined.