ReferenceExtractor (Oxygen XML API)

All Known Implementing Classes:

ImageMapExtractor
```
@API(type=NOT_EXTENDABLE,
     src=PUBLIC)
public interface ReferenceExtractor
```
Interface used to extract a Reference from a node

Since:

21.1

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.util.Optional<Reference>`	`extract(ro.sync.ecss.dom.AuthorSentinelNode node)`	Returns a `Reference` for the external resource

- Method Detail
  - extract
```
java.util.Optional<Reference> extract(ro.sync.ecss.dom.AuthorSentinelNode node)
```
    Returns a Reference for the external resource
    
    Parameters:
    
    node - the document node
    
    Returns:
    
    reference data of the external resource associated with the node