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The patientsummary module version has undergone a major re-write in the 2.0 release line, and some of the initial requirements behind it can be found here. The 1.x release line of this module (available in svn under http://svn.openmrs.org/openmrs-modules/patientsummary/) contains very limited functionality that provides a single hard-coded HIV patient summary, mainly targeted at the PIH Rwanda Implementation. The 2.0 release is not intending to provide backwards-compatibility to the 1.0 version, but rather to provide the framework within which the 1.0 version can be re-defined using new configurable constructs. Stay tuned for more details on plans for merging these two versions over time.
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