Onto.PT: Towards the Automatic Construction of a Lexical Ontology ...

138 Chapter 8. Onto.PT: a lexical ontology for Portuguese
inverses, connected by the inverseOf attribute. The same figure also shows the
constraints on the type of synset for the first and second arguments of each relation,
using respectively the range and domain attributes.
Figure 8.2: Part of the Onto.PT RDF/OWL schema.
The ontology schema was populated with the discovered synsets and sb-triples.
Figure 8.3 shows how the synset instances (#id) are represented and how their
relations are established. It presents three sb-triples, namely:
• {malcontente, insatisfeito, desagradado, descontente} antonimoAdjDe {ridente,
satisfeito, contente, contento}
({unsatisfied, discontent} antonym-of {smiling, satisfied, content})
• {satisfação, contentamento} estadoDoQueÉ {ridente, satisfeito, contente, contento}
({satisfaction, contentment} state-of {smiling, satisfied, content})
• {sensação, sentir, sentimento} hiperonimoDe {satisfação, contentamento}
({sensation, feeling} hypernym-of {satisfaction, contentment})
8.2.2 Web interface
In order to provide a friendlier way to explore the contents of Onto.PT, Onto-
Busca was developed. This web interface enables to query a triple store with the
RDF/OWL representation of Onto.PT. This interface is very similar to WordNet
Search 4 and allows to query for one lexical item, in order to obtain all the synsets
containing it. The returned synsets, represented by all their items, may be expanded
4 The web interface for Princeton WordNet, developed by its authors and available from
http://wordnetweb.princeton.edu/perl/webwn (September 2012)