HL7 (Health Level Seven) is a globally recognized standards development organization that creates frameworks and specifications for the exchange, integration, sharing, and retrieval of electronic health information . HL7 standards define both the structure and meaning (semantics) of health data exchanged between systems such as EHRs, laboratory systems, pharmacy systems, billing systems, and health information exchanges (HIEs). Examples include HL7 Version 2 messaging standards, HL7 Version 3, CDA (Clinical Document Architecture), and FHIR (Fast Healthcare Interoperability Resources). These standards enable disparate systems to interpret shared data consistently, supporting interoperability across organizational and vendor boundaries.
Option A, WHO (World Health Organization), is a global public health agency and does not create messaging standards for system interoperability. Option C, ASTM International, develops technical standards in many industries, including healthcare, but it is not primarily known for comprehensive health data exchange messaging standards. Option D, ISO (International Organization for Standardization), develops broad international standards across industries, including health informatics, but it does not specifically define the widely adopted healthcare messaging framework used for clinical system interoperability.
Therefore, HL7 is the correct answer as the established set of semantic and messaging standards used for healthcare information exchange.