The AlarmGroupType is silent on if it is dynamic or static. The FirstInGroup is also silent, but to me implies that it is a fixed list, not dynamic (configured).

But in any case , even for static, the way an AlarmGroupType is defined requires that Alarm instances be available in the AddressSpace. The AlarmGroupType requires that the instance of the AlarmGroupType have organize references to the instance of AlarmConditionType. I suppose we could make AlarmGroupType instance be like Alarm instances, and not require that they exist in the AddressSpace? [would need to add text to allow this]

We can add a method that would return the ConditionIds that are in the AlarmGroupType instance, but do the ConnditionIds exist before the alarm is actually active? would you be able to even know what the AlarmGroupType Instance ObjectId is? - would it exist in the address space, or would we need to have the method be static on the type and allow it to be called with what? the NodeId that was returned in an alarm (assumming someone subscribed for the FirstInGroup.nodeid or the SuspendGroup). This would mean that a client would not be able to pre-build any display, since the information is not available until an alarm actually occurs and then it would need to make a method call and maybe more to be able to make an intelligent display- since Nodeid are not what would be displayed, but browsenames / browsepaths for the condition that are part of the FirstInGroup. But then again the other AlarmConditions (Objects, ConditionIds) might not exist, so again what does the method call provided?

If the goal of the display is just to create a summary of all active alarms that are part of a group, this could be done on the client side, just by sorting what was returned - keeping the one with the FirstInGroupFlag at the top, or even filtering out all others. It would not require any changes to the model. I guess I'm trying to understand what the actual issue is?

Discussed in Dallas meeting -- agreed to add a Method "GetGroupMembership( ConditionID ) ". The method returns and array of structures each structure in the array contain the name of the Group and an array of all ConditionIDs in the Group.

Added method as described

Fixed as noted

Agreed to changes edited in Virtual F2F.