In order to maintain upward compatibility with the HL7 CDA, the extensible markup method of the HL7 CDA is used for reference in MML Version 3.0 (refer to HL7 CDA sections 3.2.2.6, 5.3.3, and 5.3.4).
The structure of MML Version 2.3 was analyzed, separated into the following categories, and redefined so that the contents defined in MML can be described in HL7 CDA LevelOne.
For explanatory purposes, the 16 modules below are classified into 3 categories; names for each category are defined. These modules are called MML modules.
The same prefixes are used for each module (such as mml:) in order to retain the same namespace as used in MML Version 2.3.
mmlRd:RegisterdDiagnosisModule
The structures of the 16 modules above are integrated into the <local_header> area subordinate to the <clinical_document_header> in the CDA Header of the HL7 CDA and the <local_markup> area in the HL7 CDA Body.