Table 60describes the details of the A & E Wrapper Facet. This Facet specifies the requirements for a UA Serverthat wraps an OPC Alarm& Event(AE) Server(COM). This Profileidentifies the sub-set of the UA Alarm& Conditionmodel which is provided by the COM OPC AE specification. It is intended to provide guidance to developers who are creating servers that front end existing applications. It is important to note that some OPC A&E COM Serversmay not support all of the functionality provided by an OPC UA A&C server, in these cases similar functionality maybe available via some non-OPC interface. For example if an A&E COM server does not support sending AlarmAcknowledgement messages to the system that it is obtaining alarm information from, this functionality may be available via some out of scope features in the underlying Alarmsystem. Another possibility is that the underlying system does not require acknowledgements or automatically acknowledges the alarm.

Table 60– A & E Wrapper Facet

Group	Conformance Unit / ProfileTitle	Optional
Address Space Model	Address Space Events	False
Address Space Model	Address Space Notifier Hierarchy	False
Address Space Model	Address Space Source Hierarchy	False
Alarmsand Conditions	A & C Acknowledge	False
Alarmsand Conditions	A & C Alarm	False
Alarmsand Conditions	A & C Basic	False
Alarmsand Conditions	A & C ConditionClasses	False
Alarmsand Conditions	A & C Refresh	False
Alarmsand Conditions	A & E Wrapper Mapping	False
Monitored Item Services	Monitor Basic	False
Monitored Item Services	Monitor Complex EventFilter	False
Monitored Item Services	Monitor Events	False
Monitored Item Services	Monitor Items 2	False
Monitored Item Services	Monitor QueueSize_ServerMax	False
Subscription Services	SubscriptionBasic	False
Subscription Services	SubscriptionMinimum 1	False
Subscription Services	SubscriptionPublish Discard Policy	False
Subscription Services	SubscriptionPublish Min 02	False