code: @Override
      public Set<OWLLiteral> getDataPropertyValues(OWLNamedIndividual ind,
              OWLDataProperty pe) throws InconsistentOntologyException,
              FreshEntitiesException, ReasonerInterruptedException,
              TimeOutException {
          return Collections.emptySet();
      }
docs: Gets the data property values for the specified individual and data
  property expression. The values are a set of literals. Note that the
  results are not guaranteed to be complete for this method. The reasoner
  may also return canonical literals or they may be in a form that bears a
  resemblance to the syntax of the literals in the root ontology imports
  closure.
  
  @param ind
  The individual that is the subject of the data property values
  @param pe
  The data property expression whose values are to be retrieved
  for the specified individual
  @return A set of <code>OWLLiteral</code>s containing literals such that
  for each literal <code>l</code> in the set, the set of reasoner
  axioms entails <code>DataPropertyAssertion(pe ind l)</code>.
  
  @throws InconsistentOntologyException
  if the imports closure of the root ontology is inconsistent
  @throws FreshEntitiesException
  if the signature of the individual and property expression is
  not contained within the signature of the imports closure of
  the root ontology and the undeclared entity policy of this
  reasoner is set to {@link FreshEntityPolicy#DISALLOW}.
  @throws ReasonerInterruptedException
  if the reasoning process was interrupted for any particular
  reason (for example if reasoning was cancelled by a client
  process)
  @throws TimeOutException
  if the reasoner timed out during a basic reasoning operation.
  See {@link #getTimeOut()}.
  @see {@link org.semanticweb.owlapi.reasoner.IndividualNodeSetPolicy}