| ActivityImpl | The BPMN activity element | 
| ArtifactImpl | The BPMN artifact element | 
| BaseElementImpl | The BPMN baseElement element | 
| BpmnModelElementInstanceImpl | Shared base class for all BPMN Model Elements. | 
| CallableElementImpl | The BPMN callableElement element | 
| CatchEventImpl | The BPMN catchEvent element | 
| CategoryValueRef | The BPMN categoryValueRef element of the BPMN tFlowElement type | 
| ChildLaneSet | The BPMN childLaneSet element of the BPMN tLaneSet type | 
| CollaborationImpl | The BPMN collaboration element | 
| ConversationNodeImpl | The BPMN conversationNode element | 
| CorrelationPropertyRef | The BPMN correlationPropertyRef element of the BPMN tCorrelationKey type | 
| DataAssociationImpl | The BPMN dataAssociation element | 
| DataInputImpl | The BPMN dataInput element | 
| DataInputRefs | The BPMN element dataInputRef of the BPMN tInputSet type | 
| DataOutputImpl |  | 
| DataOutputRefs | The BPMN dataOutputRefs element of the BPMN tOutputSet type | 
| DataPath | The BPMN dataPath element of the BPMN tCorrelationPropertyBinding type | 
| EndPointRef | The BPMN interfaceRef element of the BPMN tParticipant type | 
| ErrorRef | The BPMN errorRef element of the BPMN tOperation type | 
| EventDefinitionImpl | The BPMN eventDefinition element | 
| EventDefinitionRef | The BPMN eventDefinitionRef element of the BPMN tCatchEvent type | 
| EventImpl | The BPMN event element | 
| ExpressionImpl | The BPMN expression element | 
| FlowElementImpl | The BPMN flowElement element | 
| FlowNodeImpl | The BPMN flowNode element | 
| FlowNodeRef | The BPMN flowNodeRef element of the BPMN tLane type | 
| FormalExpressionImpl | The BPMN formalExpression element | 
| From | The BPMN from element of the BPMN tAssignment type | 
| GatewayImpl | The BPMN gateway element | 
| HumanPerformerImpl | The BPMN humanPerformer element | 
| Incoming | The BPMN incoming element of the BPMN tFlowNode type | 
| InMessageRef | The BPMN inMessageRef element of the BPMN tOperation type | 
| InnerParticipantRef | The BPMN innerParticipantRef element of the BPMN tParticipantAssociation type | 
| InputSetRefs | The BPMN inputSetRefs element of the BPMN tOutputSet type | 
| InterfaceRef | The BPMN interfaceRef element of the BPMN tParticipant type | 
| ItemAwareElementImpl |  | 
| LaneSetImpl | The BPMN laneSet element | 
| LoopCharacteristicsImpl | The BPMN loopCharacteristics element | 
| LoopDataInputRef | The BPMN 2.0 loopDataInputRef element of the BPMN 2.0
 tMultiInstanceLoopCharacteristics type | 
| LoopDataOutputRef | The BPMN 2.0 loopDataOutputRef element of the BPMN 2.0
 tMultiInstanceLoopCharacteristics type | 
| MessageFlowRef | The BPMN messageFlowRef element of the BPMN tConversationNode type | 
| MessagePath | The BPMN messagePath element of the BPMN tCorrelationPropertyRetrievalExpression type | 
| OperationRef | The BPMN operationRef element of the BPMN tMessageEventDefinition type | 
| OptionalInputRefs | The BPMN optionalInputRefs element of the BPMN tInputSet type | 
| OptionalOutputRefs | The BPMN optionalOutputRefs element of the BPMN tOutputSet type | 
| OuterParticipantRef | The BPMN outerParticipantRef element of the BPMN tParticipantAssociation type | 
| Outgoing | The BPMN outgoing element of the BPMN tFlowNode type | 
| OutMessageRef | The BPMN outMessageRef of the BPMN tOperation type | 
| OutputSetRefs | The BPMN outputSetRefs element of the BPMN tInputSet type | 
| ParticipantRef | The BPMN participantRef element of the BPMN tConversationNode type | 
| PartitionElement | The BPMN partitionElement of the BPMN tLane type | 
| PerformerImpl | The BPMN performer element | 
| ResourceRef | The BPMN resourceRef element of the BPMN tResourceRole type | 
| ResourceRoleImpl | The BPMN resourceRole element | 
| RootElementImpl | The BPMN rootElement element | 
| Source | The BPMN source element of the BPMN tRelationship and tLinkEventDefinition type | 
| SourceRef | The BPMN sourceRef element of the BPMN tDataAssociation type | 
| SubProcessImpl | The BPMN subProcess element | 
| SupportedInterfaceRef | The BPMN supportedInterfaceRef element of the BPMN tCallableElement type | 
| Supports | The BPMN supports element of the BPMN tProcess type | 
| Target | The BPMN target element of the BPMN tRelationship type | 
| TargetRef | The BPMN targetRef element of the BPMN tDataAssociation type | 
| TaskImpl | The BPMN task element | 
| ThrowEventImpl | The BPMN throwEvent element | 
| To | The BPMN to element of the BPMN tAssignment type | 
| Transformation | The BPMN transformation element of the BPMN tDataAssociation type | 
| WhileExecutingInputRefs | The BPMN whileExecutingInputRefs of the BPMN tInputSet type | 
| WhileExecutingOutputRefs | The BPMN whileExecutingOutputRefs element of the BPMN tOutputSet type |