Princeton WordNet 3.1

WordNet RDF

WordNet is supported by the National Science Foundation under Grant Number 0855157. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the creators of WordNet and do not necessarily reflect the views of the National Science Foundation.

This is the RDF version of WordNet, created by mapping the existing WordNet data into RDF. The data is structured according to the OntoLex-Lemon model. In addition, links have been added from the following sources:

These links increase the usefulness of the WordNet data. If you would like to contribute extra linking to WordNet please Contact us.


An OWL ontology is used to describe the structure of the RDF data. Its URL is as follows

A human-readable version is given here.

The ontology in addition contains further linking to the following resources:

This ontology is given as an OWL ontology.


A single gzipped file containing all RDF triples in N-Triples format may be downloaded here. Please refer to the licensing information

WordNet Identifiers

Words are identified by means of the following URI scheme:[nvarsp]

Where [nvarsp] is the part-of-speech. Similarly synsets are identified as follows[8 digit code]-[nvarsp]

Where the 8-digit code is the identifier of the synset.

Each file may be downloaded in a given format by adding a file extension to the URL. For example, adding .json to the URL gives the JSON version of the word or synset, e.g.,

The following formats are supported:

It is also possible to use synset identifiers from WordNet 2.0 and WordNet 3.0. The URIs use the 8-digit synset code and the part-of-speech letter code, for example as follows: