7. 2. 1. Integration rule of the “MMLHeader” with the “HL7 CDAHeader”

In the HL7 CDA specification, the following HL7 CDA Header tags are required elements. Therefore, it is necessary to assign values for each tag.

• <id>
• <document_type_cd>
• <origination_dttm>
• <provider>
• <patient>

Considering the case when an HL7 CDA-based MML V3 document is converted to the MML Version 2.3 structure, it was decided to put the MML header <mml:MmlHeader> within <local_header> to maintain backward compatibility.

It is necessary to assign attribute values to the following attributes of the <local_ header> tag. This is on of the regulations of MML content.

• It is necessary to assign the value as the “MML” string to the “render” attribute.
• It is necessary to assign the value as the “mmlheader” string to the “descriptor” attribute.
• Attributes defined in the HL7 CDA other than the two attributes above should not be used in MML Version 3.0.

As for optional tags, it is possible to use these in MML Version 3.0 based on the meanings of each tag defined in the HL7 CDA.

Information on how to set up each required tag in MML Version 3.0 is presented below.

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