index.html

<h1>WordNet RDF</h1>

<em>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.</em>

<p>This is the RDF version of WordNet, created by mapping the existing WordNet data into
RDF. The data is structured according to the <a href="http://lemon-model.net">lemon</a> model.
In addition, links have been added from the following sources:</p>

<ul>
    <li> <a href="http://verbs.colorado.edu/~mpalmer/projects/verbnet.html">VerbNet</a> </li>
    <li> <a href="http://lemon-model.net/lexica/uby">lemonUBY</a></li>
    <li> <a href="http://www.w3.org/TR/wordnet-rdf/">W3C WordNet</a></li>
    <li> <a href="http://lexvo.org">LexVo</a></li>
    <li> Translations derived from <a href="http://compling.hss.ntu.edu.sg/omw/">Open Multilingual WordNet</a> </li>
</ul>

<p>These links increase the usefulness of the WordNet data. If you would like to contribute extra linking to WordNet please <a href="http://wordnet.princeton.edu/wordnet/contact">Contact us</a>.</p>

<h3>Search</h3>

<p>You may search the RDF version of WordNet by entering a lemma into the following query field:</p>

<form action="search">
    <!--<label for="query">Search</label>--><input type="text" name="query"/><br/>
    <input type="submit" value="Search"/>
</form>

<p>Alternatively you may use the <a href="sparql/">SPARQL endpoint</a> which uses the
<a href="http://www.w3.org/TR/rdf-sparql-query/">SPARQL query language</a>.</p>

<h3>Ontology</h3>

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

<blockquote>
  <a href="ontology">http://wordnet-rdf.princeton.edu//ontology</a>
</blockquote>

<p>The ontology in addition contains further linking to the following resources:</p>

<ul>
    <li> The <a href="http://isocat.org">ISOcat</a> data category repository</li>
    <li> <a href="http://nachhalt.sfb632.uni-potsdam.de/owl/">OLiA</a> ontologies</li>
    <li> <a href="http://lexinfo.net/">LexInfo</a> ontologies</li>
</ul>

<p>This ontology is given as an <a href="http://www.w3.org/TR/owl-features/">OWL</a> ontology.</p>

<h3>Download</h3>

<p>A single gzipped file containing all RDF triples in <a href="http://www.w3.org/TR/n-triples/">N-Triples</a> 
format may be downloaded <a href="wn31.nt.gz">here</a>. Please refer to the <a href="license.html">licensing 
    information</a>
</p>

<h3>WordNet Identifiers</h3>

<p>Words are identified by means of the following URI scheme:</p>

<p><tt>
    http://wordnet-rdf.princeton.edu/wn31/word-[nvarsp]
</tt></p>

<p>Where <tt>[nvarsp]</tt> is the part-of-speech. Similarly synsets are identified
as follows</p>

<p><tt>
    http://wordnet-rdf.princeton.edu/wn31/[9 digit code]-[nvarsp]
</tt></p>

Where the 9-digit code is the identifier of the synset. The first digit 
of the synset identifies the part-of-speech according to the following table

<table>
    <tr>
        <th width="200px">Part-of-speech</th><th>Letter code</th><th>Numeric code</th>
    </tr>
    <tr>
        <td>Noun</td><td>n</td><td>1</td>
    </tr>
    <tr>
        <td>Verb</td><td>v</td><td>2</td>
    </tr>
    <tr>
        <td>Adjective</td><td>a</td><td>3</td>
    </tr>
    <tr>
        <td>Adverb</td><td>r</td><td>4</td>
    </tr>
    <tr>
        <td>Adjective Satellite</td><td>s</td><td>3</td>
    </tr>
    <tr>
        <td>Phrase</td><td>p</td><td>4</td>
    </tr>
</table>

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

<p><tt><a href="/wn31/100001740-n.json">
    http://wordnet-rdf.princeton.edu/wn31/100001740-n.json
</a></tt></p>
    
<p>The following formats are supported:</p>

<ul>
    <li><tt>.html</tt>: HTML+RDFa</li>
    <li><tt>.rdf</tt>: RDF/XML</li>
    <li><tt>.ttl</tt>: Turtle</li>
    <li><tt>.json</tt>: JSON-LD</li>
</ul>

<p>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:</p>

<p><tt>
    <a href="/wn20/00001740-a">http://wordnet-rdf.princeton.edu/wn20/00001740-a</a><br>
    <a href="/wn30/00001740-a">http://wordnet-rdf.princeton.edu/wn30/00001740-a</a>
</tt></p>


<h3>Credits</h3>

<p>WordNet was converted into RDF by <a href="http://john.mccr.ae">John P. McCrae</a> of the <a href="http://www.sc.cit-ec.uni-bielefeld.de">Semantic Computing group</a> of the <a href="http://www.uni-bielefeld.de">University Bielefeld</a>. All code is available at <a href="http://github.com/jmccrae/wn-rdf">GitHub</a>.</p>