RDA “element” is FRBR/FRAD attribute or relationship
RDA element “sub-types” are DCMI Abstract Model “sub-properties”
Elements and sub-types categorized a la <indecs> (but this categorization doesn’t appear in the draft text)
RDA elements contain “literal value surrogates,” “non-literal value surrogates, ” “typed value strings,”
or “plain value strings” as defined
in the DCMI Abstract Model