]> Super class for resources that can validate data; for example, given the relations: MyDataFormat rdfs:subClassOf data:DataFormat myData rdf:type MyDataFormat myData data:hasValidator myValidator Sending the URI of myData to myValidator should check the data for compliance against the type MyDataFormat. There are no standards on how validators signal valid or invalid data. Validators are free to define their mode of invocation and behavior. Validator