NIF-lib

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A small java library for NLP Interchange Format (NIF) for NER(D) systems

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## NIF library
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## What is NIF (NLP Interchange Format) ?

The NLP Interchange Format (NIF) is an RDF/OWL-based format that aims to achieve interoperability between Natural Language Processing (NLP) tools, language resources and annotations. NIF consists of specifications, ontologies and software (overview).

## Documentation

[NIF Documentation](http://persistence.uni-leipzig.org/nlp2rdf/)

## Supported NIF versions

* 2.0 
 * 2.1
 
 ## Jena x NIF Lib versions

* Jena 2.13.0  - 0.2.x ; 0.3.x
* Jena 3.1.0   - 0.4.x

## Supported formats

* JSON-LD
* Turtle
* RDF-xml
* NTriples

## Usage

1) Create a context 
```
NIFBean.NIFBeanBuilder contextBuilder = new NIFBean.NIFBeanBuilder();

contextBuilder.context("http://freme-project.eu", 0, 33).mention("Diego Maradona is from Argentina.").nifType(NIFType.CONTEXT);

NIFBean beanContext = new NIFBean(contextBuilder);

```

2) Create entries for the entities

```
   NIFBean.NIFBeanBuilder entityBuilder = new NIFBean.NIFBeanBuilder();
   
   List<String> types = new ArrayList<String>();
                types.add("http://dbpedia.org/ontology/Place");
                types.add("http://dbpedia.org/ontology/Location");
                types.add("http://dbpedia.org/ontology/PopulatedPlace");
                types.add("http://nerd.eurecom.fr/ontology#Location");
                types.add("http://dbpedia.org/ontology/Country");

entityBuilder.context("http://freme-project.eu", 23, 32).mention("Argentina").beginIndex(23).endIndex(32)
                .taIdentRef("http://dbpedia.org/resource/Argentina").score(0.9804963628413852)
                .annotator("http://freme-project.eu/tools/freme-ner")
                .types(types);

NIFBean entityBean = new NIFBean(contextBuilder);

```

3) Add it in an array list

```
    List<NIFBean> beans = new ArrayList<>();
    
    beans.add(entityBean);
    
```

4) Instantiate a NIF version that you like to use,

```
   NIF nif = new NIF20(beans);   // For NIF 2.0
   
   NIF nif = new NIF21(beans);   // For NIF 2.1
```

5) Finally, get the output with the format that you need

```
  nif.getJSONLD("Path for NIF Context");  //JSON-LD  
 
  nif.getTurtle(); //Turtle 
  
  nif.getRDFxml(); //RDF-xml
  
  nif.getNTriples(); //NTriples
```

## Issues

If you have any problems with or questions about this library, please contact us through a [GitHub issue](https://github.com/sandroacoelho/NIF/issues).

## Maintainers

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