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GSOC project using Mirth to import/export CDA as part of OpenEMRConnect (OEC). https://wiki.openmrs.org/display/projects/CDA-based+Clinical+Patient+Summary+Import+and+Export click here...
The OEC documentation site is not especially active (or pretty), but a lot of stuff is linked off here: https://sites.google.com/site/oeckenya/ This page has references to much of the Mirth work, which was done in late 2011, early 2012.
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