WordNetGraph

The WordNetGraph is an RDF graph generated from WordNet, whose noun and verb definitions were labeled with Definition Semantic Roles (DSR). The definitions are classified using the DSR labels proposed in the following work:

Vivian S. Silva, Siegfried Handschuh and André Freitas. Categorization of Semantic Roles for Dictionary Definitions. Cognitive Aspects of the Lexicon (CogALex-V), Workshop at the 26th International Conference on Computational Linguistics, (COLING), Osaka, 2016.

The classified definitions are segmented into roles. The RDF graph is a slightly modified version of the conceptual model presented in the paper. In this graph, each synset (definiendum) is a node, linked to its supertype. The supertype is, in turn, linked to all the other roles.

Please note that the role labeling is an automatic task, so the graph may contain some classification errors. The current accuracy of the automatic classifier is around 80%.

There are four namespaces defined for the model:

Namespace	Full Namespace URI	Usage
dsr	http://nlp/resources/DefinitionSemanticRoles#	Model properties
wnn	http://nlp/resources/synsets/WordNetNounSynset#	Resources denoting WordNet noun synsets
wnv	http://nlp/resources/synsets/WordNetVerbSynset#	Resources denoting WordNet verb synsets
wne	http://nlp/resources/expression/WordNetExpression#	Resources denoting the synset's definition roles, which can range from a single word to a whole sentence

The following properties were defined for the model:

Property	Usage
dsr:has_supertype	Links the synset to the supertype(s) role(s)
dsr:has_diff_qual	Links a supertype to a differentia quality role
dsr:has_diff_event	Links a supertype to a differentia event role
dsr:at_time	Links a differentia event to its event time
dsr:at_location	Links a differentia event to its event location
dsr:has_qual_modif	Links a differentia quality to its quality modifier
dsr:has_origin_loc	Links a supertype to a origin location role
dsr:has_purpose	Links a supertype to a purpose role
dsr:has_assoc_fact	Links a supertype to a associated fact role
dsr:has_acc_qual	Links a supertype to a accessory quality role
dsr:has_acc_det	Links a supertype to a accessory determiner role

Supertype roles are always represented as resources. The differentia quality and differentia event roles can be represented as either resources, when they have components (event times and/or locations, or quality modifiers) to be linked to; or literals otherwise. All the other roles are represented as literals.

As an example, the noun synset People against Gangsterism and Drugs, PAGAD, whose definition is:

a terrorist organization in South Africa formed in 1996 to fight drug lords

received the following classification:

which can be interpreted as:

In the RDF graph, we have:

<rdf:Description rdf:about="http://nlp/resources/synsets/WordNetNounSynset#People_against_Gangsterism_and_Drugs__PAGAD">
    <rdf:type>
      <rdf:Statement>
        <rdf:object>to fight drug lords</rdf:object>
        <rdf:predicate rdf:resource="http://nlp/resources/DefinitionSemanticRoles#has_purpose"/>
        <rdf:subject rdf:resource="http://nlp/resources/expression/WordNetExpression#terrorist_organization"/>
      </rdf:Statement>
    </rdf:type>
    <rdf:type>
      <rdf:Statement>
        <rdf:object>
          <rdf:Statement>
            <rdf:object>in 1996</rdf:object>
            <rdf:predicate rdf:resource="http://nlp/resources/DefinitionSemanticRoles#at_time"/>
            <rdf:subject rdf:resource="http://nlp/resources/expression/WordNetExpression#formed"/>
          </rdf:Statement>
        </rdf:object>
        <rdf:predicate rdf:resource="http://nlp/resources/DefinitionSemanticRoles#has_diff_event"/>
        <rdf:subject rdf:resource="http://nlp/resources/expression/WordNetExpression#terrorist_organization"/>
      </rdf:Statement>
    </rdf:type>
    <rdf:type>
      <rdf:Statement>
        <rdf:object>in South Africa</rdf:object>
        <rdf:predicate rdf:resource="http://nlp/resources/DefinitionSemanticRoles#has_origin_loc"/>
        <rdf:subject rdf:resource="http://nlp/resources/expression/WordNetExpression#terrorist_organization"/>
      </rdf:Statement>
    </rdf:type>
    <dsr:has_supertype rdf:resource="http://nlp/resources/expression/WordNetExpression#terrorist_organization"/>
</rdf:Description>