Table 38describes the details of the Standard DataChange Subscription ServerFacet. This Facet specifies the standard support of subscribing to data changes. This Facet extends features and limits defined by the Embedded Data Change SubscriptionFacet. As a minimum, Serversshall 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 Sessionis required. This Facet also requires the support of the triggering service. This Facet has been updated to include optional ConformanceUnitsto allow for backward compatibility. These optional ConformanceUnitsare highly recommended, in that in a future release they will be made mandatory.

Table 38– Standard DataChange Subscription Server Facet

Group

Conformance Unit / ProfileTitle

Optional

Profile

Embedded DataChange Subscription ServerFacet

False

Base Information

Base Info GetMonitoredItems Method

True

Method Services

MethodCall

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

SubscriptionMinimum 02

False

Subscription Services

SubscriptionPublish Min 05

False