HL7 message exchange behaviour is governed by two forms of operation
· State Exchange Form(SEF)
· Remote Invocation Form(RIF)
State Exchange Form (SEF) is used to synchronise business processes running in separate systems usually across organisations. That is a business process engine in one organisation aligns the state of its process with a business process engine in another. SEF is usually performed through HL7 messages using reliable asynchronous ebXML pattern. Examples where SEF is used is in case of updates to patient demographics or creation of a new patient in a local system. The changes are initially done in the local application and then the external systems are notified of the changes through update or create messages. The external systems then use the data in these messages and update the data to keep in sync with the sending system.
Remote Invocation Form (RIF) is derived from standard client-server methods. The model is inherently synchronous from the perspective of the human actor in that the actor is “blocked” waiting for a response. RIF is usually performed through HL7 messages using synchronous Web service pattern or unreliable asynchronous ebXML pattern. Examples where RIF is used is in case of queries and retrievals of data from other systems. The sender system sends a query to the receiving system which maintains the MPI for the organisation and uses that data for further processing.
· State Exchange Form(SEF)
· Remote Invocation Form(RIF)
State Exchange Form (SEF) is used to synchronise business processes running in separate systems usually across organisations. That is a business process engine in one organisation aligns the state of its process with a business process engine in another. SEF is usually performed through HL7 messages using reliable asynchronous ebXML pattern. Examples where SEF is used is in case of updates to patient demographics or creation of a new patient in a local system. The changes are initially done in the local application and then the external systems are notified of the changes through update or create messages. The external systems then use the data in these messages and update the data to keep in sync with the sending system.
Remote Invocation Form (RIF) is derived from standard client-server methods. The model is inherently synchronous from the perspective of the human actor in that the actor is “blocked” waiting for a response. RIF is usually performed through HL7 messages using synchronous Web service pattern or unreliable asynchronous ebXML pattern. Examples where RIF is used is in case of queries and retrievals of data from other systems. The sender system sends a query to the receiving system which maintains the MPI for the organisation and uses that data for further processing.
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