languageCode in CDA

[ramesh.s...@gmail.com]

The CDA document contains languageCode at the Realm Header level, as well as at the Patient section. In the Realm Header, the language code used is "en-US" in the sample CDA files provided by TTT, but for the patient language communication it is given as "eng". As per the Spec, that indicates the use of ISO 639-2 alpha-3 and, "eng" seems to be correct.

Is "en-US" used at the Realm Header, by TTT, correct? (validation passes in TTT with "en-US" for realm header).

<ClinicalDocument ...>
<languageCode code="en-US"/> ----> IS THIS CORRECT ALSO?

[Andrew McCaffrey]

Yes, for details on the languageCode used in the header of a
Consolidated CDA, please see section 2.2, conformance statement 9:
"SHALL contain exactly one [1..1] languageCode which SHALL be selected
from ValueSet Language 2.16.840.1.113883.1.11.11526 DYNAMIC
(CONF:5372)." That value set references:
https://www.ietf.org/rfc/rfc4646.txt

And there's an example in Figure 17 of C-CDA:

<languageCode code="en-US"
displayName="English, US"
codeSystem="2.16.840.1.113883.1.11.11526"
codeSystemName="Internet Society Language"/>

Hope that helps,
-Andrew

--
Andrew McCaffrey
andrew.m...@nist.gov
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