ExternalReferenceHandlerIF (Ontopia)

All Known Implementing Classes:

NoFollowTopicRefExternalReferenceHandler, NullResolvingExternalReferenceHandler
```
public interface ExternalReferenceHandlerIF
```
PUBLIC: An interface that can be implemented by handlers that would like to intercept external references in topic map documents.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`LocatorIF`	`externalTopic(LocatorIF address)`	PUBLIC: Receive notification of a reference to an external topic.
`LocatorIF`	`externalTopicMap(LocatorIF address)`	PUBLIC: Receive notification of a reference to an external topic map.

- Method Detail
  - externalTopicMap
```
LocatorIF externalTopicMap(LocatorIF address)
```
    PUBLIC: Receive notification of a reference to an external topic map.
    
    Returns:
    
    The locator which should be used to resolve the reference; if null is returned it will be interpreted as that the reference should not be traversed.
  - externalTopic
```
LocatorIF externalTopic(LocatorIF address)
```
    PUBLIC: Receive notification of a reference to an external topic.
    
    Returns:
    
    The locator which should be used to resolve the reference; if null is returned it will be interpreted as that the reference should not be traversed.