Document Metadata Subscription - IHE
Document Metadata Subscription - IHE
Document Metadata Subscription - IHE
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<strong>IHE</strong> Technical Framework Supplement - <strong>Document</strong> <strong>Metadata</strong> <strong>Subscription</strong> (DSUB)1115 4.4.1.6 Cascading <strong>Subscription</strong>s↑ Subscribe↑ SubscribeNotify ↓NotificationBrokerSubscriberNotify ↓NotificationBrokerSubscriberNotify ↓NotificationBrokerSubscriberSubscribe↑Subscribe↑Subscribe↑NotificationRecipientSubscriberNotificationRecipientSubscriberNotificationRecipientSubscriber Notify ↓Figure 4.4.1-6 Cascading <strong>Subscription</strong>s1120In some cases, the Notification Broker may be grouped with a Subscriber, which allows asubscribe request sent to the Notification Broker to be forwarded to other Notification Brokers.This figure shows a possible configuration for such a case.4.4.2 Publish/Subscribe Transactions and PatternsFigure 4.4.1-1 shows the set of transactions available for implementing publish/subscribefunctionality. The following subsections will describe the transactions and some possible uses.1125 The publish/subscribe transactions described in this section use the OASIS Web ServicesNotification family of standards as the basis for the format of the transactions.4.4.2.1 Subscribe4.4.2.1.1 Scope1130This transaction involves a request by the Subscriber actor to the Notification Broker to start asubscription using a particular set of filters, or to cancel an existing subscription.2009-08-10 46 Copyright © 2009: <strong>IHE</strong> International
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