code: @Override
      public boolean isDeprecatedIRIAnnotation() {
          return property.isDeprecated() && value instanceof OWLLiteral
              && ((OWLLiteral) value).isBoolean()
              && ((OWLLiteral) value).parseBoolean();
      }
docs: Determines if this annotation is an annotation used to deprecate an IRI.
  This is the case if the annotation property has an IRI of
  {@code owl:deprecated} and the value of the annotation is
  {@code "true"^^xsd:boolean}
  
  @return {@code true} if this annotation is an annotation that can be used
  to deprecate an IRI, otherwise {@code false}.