This DataType is an enumeration that identifies a NodeClass. Its values are defined in Table 29.
| Name | Value | Description | 
| Unspecified | 0 | No value is specified. | 
| Object | 1 | The Node is an Object. | 
| Variable | 2 | The Node is a Variable. | 
| Method | 4 | The Node is a Method. | 
| ObjectType | 8 | The Node is an ObjectType. | 
| VariableType | 16 | The Node is a VariableType. | 
| ReferenceType | 32 | The Node is a ReferenceType. | 
| DataType | 64 | The Node is a DataType. | 
| View | 128 | The Node is a View. |