| ▼Ncogitant | |
| ▼Nbase | |
| CConstraint | Constraint |
| CCoupleOfLambdas | Couple of lambda-graphs |
| CCoupleOfProjections | Couple of Projections |
| CEnvironment | Environment |
| ▼CEnvironmentObject | Environment object |
| CType | Object type |
| CException | Base class of Cogitant exceptions |
| CExceptionIncorrectType | Exception thrown when an object has an incorrect type |
| CExceptionInput | Exception thrown when an error is found while reading a stream |
| CExceptionInputBCGCT | Exception thrown when an error is found in a BCGCT stream |
| CExceptionInputCoGXML | Exception thrown when an error is found in a CoGXML stream |
| CExceptionInputLexeme | Exception thrown when a lexeme is found whereas it is forbidden |
| CExceptionInterrupted | Exception thrown when an operation is interrupted |
| CExceptionIO | Exception thrown when a IO operation fails |
| CExceptionObserver | Exception thrown when an error is found while handling observers |
| CExceptionOperation | Exception thrown when an error is found while running an operation |
| CExceptionUnknownObject | Exception thrown when the given object is not found |
| CExceptionXml | Exception thrown when an error is found in a XML stream |
| CGraph | Graph |
| CGraphEdge | Edge of a Graph |
| ▼CGraphObject | Node of a Graph |
| CReferentType | Referent type |
| CType | Node type |
| CGraphSubset | Subset of nodes of a Graph |
| ▼CIOHandler | Input/Output handler |
| CConfigPropertyBool | I/O Configuration |
| CFormat | File formats |
| CObservableObject | Observable object |
| CObserver | Observer |
| ▼CObserverMessage | Message for an Observer |
| CType | Message type |
| CObserverMessageGraph | Message on a Graph for an Observer |
| CObserverMessageGraphNodeComeFrom | Message on the origin of a change in a Graph for an Observer |
| CObserverMessageGraphRuleApplication | Message for an application of a Rule on Graph for an Observer |
| CProjection | Projection |
| CProjectionConfig | Configuration of the projection operation |
| CRule | Rule |
| CSupport | Support |
| ▼CSupportObject | Element of a support (concept type, relation type, nesting type, individual) |
| CType | Node type |
| ▼Njni | |
| CEnvironment | Environment |
| CGraphEdge | Edge of a Graph |
| CJniObject | A JniObject contains a pointer to a C++ object |