/
@
[
]
When lang attribute is present, the value must equal the value of xml:lang.
RDDL resources must be within the html body.
There should be at least one RDDL resource in the body.
The element rddl:resource should contain only the attributes id, xml:base, xml:lang, xlink:href, xlink:arcrole, xlink:role, xlink:href.
The rddl:resource element should only have child elements from the XHTML and RDDL namespaces.
RDDL resources are simple Xlinks.
xlink:embed,xlink:show are not used.
The value of xlink:role cannot be a relative URI reference.
The value of xlink:arcrole cannot be a relative URI reference.
A rddl:resource should have a description.
Parent element [
] must be either Flow.mix or Block.mix, Element [
]