IHE_PIX_PDQ_V2_Direct

The IHE_PIX_PDQ_V2_Direct project handles HL7 v2 messages for patient admissions, updates, and merges as well as PIX queries and patient demographics queries. It contains a main BPEL process and several subprocesses, each designed to handle a different type of HL7 event. The main BPEL process uses a Pick activity to determine the type of incoming message and the subprocess to use to process it. The BPEL processes define mapping from the incoming messages to the master index, call the Domain Lookup service to resolve domain names, and define how the data is manipulated or transformed and routed. They also generate ACK/NACK responses and ATNA audit repository messages. The BPEL processes call the master index API to add, update, and merge records and to query the database.

The BPEL subprocesses all perform request/reply operations and are all called from the main BPEL process, IHEPixPdqV2BpelProcess. The IHE_PIX_PDQ_V2_Direct project includes the following subprocesses under the folder BpelProceses:

• processAdtA40MsgBpel: Processes merge events (A40).

• processAdtMsgBpel: Processes patient add or update events (A01, A04, A05, and A08).

• processQ22MsgBpel: Processes patient demographics queries (Q22).

• processQbpMsgBpel: Processes PIX queries for associated patient identifiers (Q23).

The first three subprocesses in the above list map directly to the master index object structure. If you modify the master index object structure, the mapping in these processes might also need to be updated.

This project includes the corresponding WSDL documents for the main process and subprocesses, and XML schema files to support HL7 processing. The main WSDL document, hl7RecvWsdl specifies all request and response message types, along with the required ports and HL7 bindings. This is the file where the HL7 WSDL extensibility elements (address, protocolproperties, and communicationcontrols) are defined. There are additional WSDL documents that are specific to the type of event being processed and one to support the ATNA repository. Each is associated with a specific BPEL process and is named similarly to the BPEL process for which it is designed.