| Class | Description | |
|---|---|---|
 | AEAttributeElement | Contains information gathered about an OPC event attribute. |
| AEAttributeElementCollection | A collection of attribute elements (AEAttributeElement), keyed by their Attribute Ids. |
| AECategoryElement | Contains information gathered about an OPC event category. |
| AECategoryElementCollection | A collection of category elements (AECategoryElement), keyed by their Category Ids. |
| AEConditionElement | Contains information gathered about an OPC event condition. |
| AEConditionElementCollection | A collection of condition elements (AEConditionElement), keyed by their names. |
| AENodeElement | Contains information gathered about an OPC node (area or source in OPC event server's area space). |
| AENodeElementCollection | A collection of node elements (AENodeElement), keyed by their names. |
| AESubconditionElement | Contains information about an OPC event subcondition. |
| AESubconditionElementCollection | A collection of subcondition elements (AESubconditionElement), keyed by their names. |