Rong Chen, the original author of the openEHR Java implementation has finally returned to mainstream humanity, after completing his Doctoral dissertation. The abstract and link can be found here: http://www.openehr.org/shared-resources/publications/archetypes.html .
An abstract from the abstract: The key contribution of the thesis can be summarized as the validation and further improvement of the openEHR archetype formalism through software implementation and the explorations on clinical guidelines, shared care plans and legacy EHR content models in relation to archetype-based EHR framework. congratulations Rong! - thomas beale