ITI Technical Framework - IHE

IHE IT Infrastructure Technical Framework, Volume 2a (ITI TF-2a): Transactions Part A_________________________________________________________________________________Client AuthenticationAgent ActorContextManagerActorUser ContextParticipantActorLocate Context ManagerJoinCommonContextInitializeBindingFinalizeBindingLocate Context ManagerJoinCommonContextInitializeBindingFinalizeBinding650Figure 3.5-2 User Subject Join Context Interaction Diagram3.5.4.1 Join Context – Locate Method655To join the common context upon launch of an application, it is necessary for the context participant tolocate the Context Manager that supports context management for the user’s workstation. This isachieved by the invocation of the Locate method in accordance with specifications of the HL7 ContextManagement “CCOW” Standard.3.5.4.1.1 Trigger EventsThe Locate method is triggered by the user launch of an application that contains one of the followingactors: Patient Context Participant, User Context Participant or Client Authentication Agent.6606653.5.4.1.2 Message SemanticsIn a Web/HTTP implementation, Locate is defined as a method of the ContextManagementRegistryinterface. The IHE Context Manager Actor provides this interface for the context participants to callupon, and thus implements the CCOW defined Context Management Registry, which is used to locatethe appropriate instance of the Context Manager.In an ActiveX implementation, the context participants determine the location of the instance of ContextManager from the operating system registry.3.5.4.1.3 Expected ActionsThe Locate method invocation is specific to the Web technology mapping. In this case, the ContentManager shall return the valid URL of the Context Manager instance or a CCOW defined_________________________________________________________________________________Rev. 7.0 Final Text 2010-08-10 28 Copyright © 2010 IHE International, Inc.