| Interface | Description | 
|---|---|
| EntityLinker<T extends Span> | EntityLinkers establish connections to external data to enrich extracted
 entities. | 
| Class | Description | 
|---|---|
| BaseLink | Stores a minimal tuple of information. | 
| EntityLinkerFactory | Generates an EntityLinker implementation via properties file configuration | 
| EntityLinkerProperties | Properties wrapper for the EntityLinker framework | 
| LinkedSpan<T extends BaseLink> | An "default" extended span that holds additional information about the Span | 
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