Metadata about what, in ISO-11179, is called a "Data Element Concept" - "a concept that can be expressed in the form of a data element, described independently of any particularrepresentation."The HL7 SFM defines a ConceptDomain as "A named category of like concepts (a semantic type) that will be bound to one or more attributes in a static model whose datatypes are coded. Concept Domains exist to constrain the intent of the coded element while deferring the association of the element to a specific coded terminology until later in the model development process. Thus, Concept Domains are independent of any specific vocabulary or codesystem.Concept Domains represents an abstract conceptual space such as 'countries of the world', 'the gender of a person used for administrative purposes', 'languages of the world', etc." Metadata about what, in ISO-11179, is called a "Data Element Concept" - "a concept that can be expressed in the form of a data element, described independently of any particularrepresentation."The HL7 SFM defines a ConceptDomain as "A named category of like concepts (a semantic type) that will be bound to one or more attributes in a static model whose datatypes are coded. Concept Domains exist to constrain the intent of the coded element while deferring the association of the element to a specific coded terminology until later in the model development process. Thus, Concept Domains are independent of any specific vocabulary or codesystem.Concept Domains represents an abstract conceptual space such as 'countries of the world', 'the gender of a person used for administrative purposes', 'languages of the world', etc." the name and URI of an EntityDescription that describes the domain and scope of meaning for the ConceptDomain. If present, this association is equivalent to the data_element_concept_domain association in section 11.2.3.2 of ISO 11179-3. entityrReference provides a definition for the ConceptDomain and potentially describes its relationship with other ConceptDomains as well as providing a semantic link to the possible value meanings available to domain bindings. a URI that resolves to the known bindings (aka. Data Elements) of the referenced ConceptDomain the name by which the concept domain is known within the context of the CTS₂ service instance. conceptDomainName must uniquely designate a single, abstract ConceptDomain within the context of all concept domains known to the instance of the service. Note that conceptDomainName is not necessarily globally unique and the about URI should be used whenever communication information about the ConceptDomain across time or service instances. A ConceptDomainCatalogEntry read from a service instance. PSM A directory of ConceptDomain resources that meet a specified criteria. a synopsis of a ConceptDomain along with information about how to access the complete resource a reference to an EntityDescription that describes the domain and scope of meaning for the ConceptDomain. If present, this association is equivalent to the data_element_concept_domain association in section 11.2.3.2 of ISO 11179-3. entityrReference provides a definition for the ConceptDomain and potentially describes its relationship with other ConceptDomains as well as providing a semantic link to the possible value meanings available to domain bindings. a URI that resolves to the known bindings (aka. Data Elements) of the referenced ConceptDomain the name by which the concept domain is known within the context of the CTS₂ service instance. conceptDomainName must uniquely designate a single, abstract ConceptDomain within the context of all concept domains known to the instance of the service. Note that conceptDomainName is not necessarily globally unique and the about URI should be used whenever communication information about the ConceptDomain across time or service instances. A collection of complete ConceptDomain resources that meet a specified criteria. An instance of ConceptDomain that meets a specified filter criteria.