Event Attributes in the A&E COM Serverare represented in the UA Serveras Variableswhich are targets of HasProperty References from the ObjectTypeswhich represent the EventCategories. The BrowseNameand DisplayNameare the description for the Event Attribute. The data type of the Event Attributeis used to set DataTypeand ValueRank. The NodeIdis constructed from the EventCategoryId, ConditionName and the AttributeId.