Structured Document Architecture

(main entry to be created)

FAQ

CDA R2 using a non-XML ITS

• In how far is CDA R2 "abstract"? - In other words: if one were to attempt to apply a different ITS (assuming there was one, e.g. ASN.1 or CORBA), what would the "open issues list" look like?

There are 3 known issues:

• Structure of the Narrative Block
• IIref mechanism

(CDA R2 Documentation) "Specific enhancements to the CDA Schema, above and beyond those defined in the HL7 V3 XML ITS, are described [..] in CDA XML Implementation (§ 6 )." Section 6 states: "The CDA Narrative Block, which is the XML content model of section.text, is manually crafted, as described above (see Section Narrative Block (§ 4.3.5 ))."

(Charlie McKay) The way that references between parts of the narrative block and the structured content are done in an XML specific way (reasonably enough because HL7 itself -as an standard- does not have an IIref mechanism agreed yet). This is the rationale for the schema edit: Add "ID" attribute, of type XML ID, to Section, ObservationMedia, RegionOfInterest