The resource element is in
the http://www.rddl.org/ namespace.
The rddl prefix is customary.
The rddl:resource element is a simple XLink;
that is, it has an xlink:type="simple" attribute
The rddl:resource element
can be placed anywhere in HTML
where a p element may appear.
The rddl:resource can contain may of the XHTML Basic elements
(headings, paragraphs, lists, hyperlinks,
forms, tables, images, meta information )
that the body element may contain.
The content of the
rddl:resource element should describe the associated resource.
Resource elements can contain other resource elements.