references a bib:entry and optionally gives page number references another concept when mentioned in definition or scopeNote references an example in another location through a URI root node. the ontology. contains DC metadata records used to connect systems and features, since they are not connected directly by subclass a piece of prose for human consumption, describing a concept or relationship caveats and such that don't really go into the definition in complementary distribution with valueOf (previously 't') bucket that contains prose for definition and scopeNote in complementary distribution with subclassOf used to store html tables