<H3>Special Instructions</H3>  <p>The  HITSP T23 Patient Demographics Consumer Transaction applies the following constraints to the IHE PDQ Query Message: <li>QDP-2	  - Must contain a unique value from the Patient Demographics Consumer that identifies each specific query message; an incrementing number may be used if desired <li>QPD-3.4.2 - Must be an ISO object identifier (OID) and QPD-3.4.3 must contain 'ISO' <li>QPD-8.4.3 - Must be an ISO object identifier (OID) and QPD-8.4.3 must contain 'ISO' <li>QPD-3.1    - The IHE Pediatric Demographic Option cited for optional constraint by the Interoperability Specification. Testing conformance to the IHE tests associated with this option is encouraged, but not required  <p>These constraints are verified in test 'HITSP_T23_PDQ_PDC_MSG_CNST' listed in the prerequisite tests below. The  HITSP T23 Patient Demographics Consumer actor must complete each of the Prerequisite tests identified below. </P> 	 <H3>Prerequisite:</H3> <p>Require:</p> <li>PDQ_Exact_Name <li>PDQ_Multiple_Query</li> <li>HITSP_T23_PDQ_PDC_MSG_CNST</li> <p>Conditional - Required if Option is Selected: </P> <li>PDQ_PDO_Query_with_Twin_Data <li>PDQVisitQuery</li>   <H3>Evaluation:</H3 <p>The monitor will validate that all prerequisite tests are successfully completed. </P>  <H3>Description:</H3> <p>Complete all IHE and HITSP prerequisite tests. Once these tests are completed, notify the Connectathon monitor or monitors responsible for  HITSP T23 Patient Demographics Consumer Validation Test. </P>	