This section defines a profile of [[HTML5]] for creating iiRDS XHTML5 content. An instance of an XML document that conforms to this profile is referred to as iiRDS XHTML content in this specification.
Unless otherwise specified, this specification inherits all definitions of semantics, structure, and processing behavior from the [[HTML5]] specification.
Only elements mentioned in this specification are part of iiRDS XHTML5.
If no content model or attributes are explicitly specified, then iiRDS XHTML5 MUST comply with the [[HTML5]] specification.