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The Clinical Document Architecture, a V3-based standard, provides an exchange model for clinical documents (such as discharge summaries and progress notes) - and brings the healthcare industry closer to the realization of an electronic medical record. CDA leverages the use of XML, the HL7 Reference Information Model (RIM) and coded vocabularies. RIM is the basis for the Clinical Document Architecture standard being adopted internationally.

Common Message Element Types (CMETs) are standardized model fragments intended to be building blocks that individual content domains can "include" in their designs. These blocks reduce the effort to produce a domain-specific design and assure that similar content across multiple domains is consistently represented.

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