Moreover OntoLT involves predefined preconditions which are executed as XPath expression with Xml based annotation corpus. The predefined precondition selects the predicate, modifier and head. Example of these rules: (Noun ToClass ModtoSubClass) This rule will match all head nouns suggested by the statistical preprocessing with all classes provided by the ontology. Moreover the rule will map also subclasses of the ontology. After the execution of the mapping rule, OntolT will allow to user to validate the suggested