- Resource Description ? a changeable element that is a collection of assertions about an external IRI. In the CTS2 specification, resource descriptions describe resources of type:
Code system – an abstraction of a code system such as the Gene Ontology, the Dublin Core Metadata Terms or SNOMED CT. - Code system version – a specific version or release of an abstract code systems, drawn from a specific source, such as the "OBO rendering Gene Ontology Version that was released on May 13, 2010 at 14:00 Pacific time",
the "RDF rendering of 2008/01/14 release of the Dublin Core Metadata Terms" and the "OWL rendering of the 2010AA SNOMED CT release as interpreted by Kent Spackman's table to OWL conversion utility".
- Abstract value set – an abstract value set, such as “The Wound History Value Set”.
- Value set definition ? the "Definition of the Wound History value set drawn from the Initial Load VADS 3.0".
- Value set resolution rules --a set of rules for representing a value set in a specific context, such as “the English rendering of The Wound History Value Set for data input”.
- Value set resolution rule version – a specific version of a set of value set resolution rules.
- Concept domain – the name of a conceptual domain that can be associated with one or more sets of value meanings depending on the use and context, such as “the HL7 ObservationType concept domain.
- Concept domain binding rules – a collection of rules for assigning a concept domain with a specific value set – such a “binding rules for the HL7 ObservationType as defined in Version:
V 02?30 (12/3/2009) of the HL7 Reference Information Model (RIM)”.
- Entity description ? the description of a type, class or individual according to a specific code system version, such as the description of "title" according to "RDF rendering of 2008/01/14 release of the Dublin Core Metadata Terms" or the description of "oxygen binding" according to the "OBO rendering Gene Ontology Version that was released on May 13, 2010 at 14:00 Pacific time".