A mixin class providing access to services in the external environment.

Declaration :

• C++ : class EXTERNAL_ENVIRONMENT_ACCESS : public TERMINOLOGY_SERVICE, public MEASUREMENT_SERVICE
• Java : package abstract class EXTERNAL_ENVIRONMENT_ACCESS extends TERMINOLOGY_SERVICE implements MEASUREMENT_SERVICE

All public operations : code_set , code_set_for_id , code_set_identifiers , has_code_set , has_terminology , is_valid_units_string , openehr_code_sets , terminology , terminology_identifiers , units_equivalent , valid_code_set_id , valid_terminology_group_id