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A source condition associates a source with a condition space. A source condition holds the current information specific to
a source using a particular condition space for the supervision. A source condition has no own identification and is identified
by its associated source and condition space. Information about a source condition is accessed through its home object. In
OPC a source condition is sometimes called an instance of a condition.
In OPC the SourceCondition interface is implemented by the methods:
• IOPCEventServer::QuerySourceConditions()
• IOPCEventServer::AckCondition().
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Figure 5-15 DAIS alarms and events source condition IDL in UML