* @param l The literal in the ontology model format.
* @return The literal in the internal model format.
*/
private au.csiro.snorocket.core.model.AbstractLiteral transformLiteral(Literal l) {
if(l instanceof au.csiro.ontology.model.DateLiteral) {
return new DateLiteral(((au.csiro.ontology.model.DateLiteral) l).getValue());
} else if(l instanceof au.csiro.ontology.model.DecimalLiteral) {
return new DecimalLiteral(((au.csiro.ontology.model.DecimalLiteral) l).getValue());
} else if(l instanceof au.csiro.ontology.model.IntegerLiteral) {
return new IntegerLiteral(((au.csiro.ontology.model.IntegerLiteral) l).getValue());
} else if(l instanceof au.csiro.ontology.model.StringLiteral) {