| Interface | Description | 
|---|---|
| MultiplePersistentPropertyDifference<T> | 
 Difference when persistent property with multiplicity more than one is changed. 
 | 
| PersistentPropertyOrderDifference<T> | 
 Generated for ordered multiple persistent properties. 
 | 
| SymbolAddition | 
 New symbol added difference. 
 | 
| SymbolDeletion | 
 Symbol deleted difference. 
 | 
| SymbolDifference | 
 Difference for symbol. 
 | 
| SymbolPersistentPropertyDifference<T> | 
 Persistent symbol property changed. 
 | 
| Class | Description | 
|---|---|
| SymbolData | 
 Info class that remembers symbol id, shape, element id of symbols' model element
 and whether symbol has a manipulator. 
 |