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Validation of FHIR data
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There are two approaches to validation in the SDK:

* A validation based on ``System.ComponentModel.DataAnnotations``, that runs the most important validation checks on the POCO FHIR datamodel in memory. This is useful to
  do validation of the core FHIR resources and datatypes when working with POCO data.
* A *profile validator*, which can validate FHIR data against `profiles <http://hl7.org/fhir/profilelist.html>`_ . These profiles contain the full gamut of FHIR validation rules, and
  are used to validate the data in the FHIR resources.