NLTKNERecogniser (Apache Tika 3.1.0 API)

java.lang.Object
- org.apache.tika.parser.ner.nltk.NLTKNERecogniser

All Implemented Interfaces:

NERecogniser
```
public class NLTKNERecogniser
extends Object
implements NERecogniser
```
This class offers an implementation of NERecogniser based on ne_chunk() module of NLTK. This NER requires additional setup, due to Http requests to an endpoint server that runs NLTK. See

Field Summary

Fields
Modifier and Type Field Description

static Set<String> ENTITY_TYPES
some common entities identified by NLTK

Fields inherited from interface org.apache.tika.parser.ner.NERecogniser
DATE, LOCATION, MISCELLANEOUS, MONEY, ORGANIZATION, PERCENT, PERSON, TIME

Constructor Summary

Constructors
Constructor Description

NLTKNERecogniser()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

Set<String> getEntityTypes()
Gets set of entity types recognised by this recogniser

boolean isAvailable()
checks if this Named Entity recogniser is available for service

Map<String,Set<String>> recognise(String text)
recognises names of entities in the text

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - ENTITY_TYPES
```
public static final Set<String> ENTITY_TYPES
```
    some common entities identified by NLTK
- Constructor Detail
  - NLTKNERecogniser
```
public NLTKNERecogniser()
```
- Method Detail
  - isAvailable
```
public boolean isAvailable()
```
    Description copied from interface: NERecogniser
    
    checks if this Named Entity recogniser is available for service
    
    Specified by:
    
    isAvailable in interface NERecogniser
    
    Returns:
    
    true if server endpoint is available. returns false if server endpoint is not avaliable for service.
  - getEntityTypes
```
public Set<String> getEntityTypes()
```
    Gets set of entity types recognised by this recogniser
    
    Specified by:
    
    getEntityTypes in interface NERecogniser
    
    Returns:
    
    set of entity classes/types
  - recognise
```
public Map<String,Set<String>> recognise(String text)
```
    recognises names of entities in the text
    
    Specified by:
    
    recognise in interface NERecogniser
    
    Parameters:
    
    text - text which possibly contains names
    
    Returns:
    
    map of entity type -> set of names