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6.6.16 Standard DataChange Subscription Server Facet ToC Previous Next

Table 38 describes the details of the Standard DataChange Subscription Server Facet. This Facet specifies the standard support of subscribing to data changes. This Facet extends features and limits defined by the Embedded Data Change Subscription Facet. As a minimum, Servers shall support 2 Subscriptions with at least 100 items for at least half of the required Sessions. The 100 items shall be supported for at least half of the required Subscriptions. Queuing with up to two queued entries is required. Support of five parallel Publish requests per Session is required. This Facet also requires the support of the triggering service. This Facet has been updated to include optional ConformanceUnits to allow for backward compatibility. These optional ConformanceUnits are highly recommended, in that in a future release they will be made mandatory.

Table 38 – Standard DataChange Subscription Server Facet

Group Conformance Unit / Profile Title Optional
Profile Embedded DataChange Subscription Server Facet False
Base Information Base Info GetMonitoredItems Method True
Method   Services Method   Call True
Monitored Item Services Monitor Items 10 False
Monitored Item Services Monitor Items 100 False
Monitored Item Services Monitor MinQueueSize_02 False
Monitored Item Services Monitor Triggering False
Monitored Item Services Monitored Items Deadband Filter False
Subscription   Services Subscription   Minimum 02 False
Subscription   Services Subscription   Publish Min 05 False

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