<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def is_legal_object(self, data_type: str) -> bool: """ Do data_type validation according to the rules of the XML xsd schema. Args: data_type: Returns: """

        data_type = str(data_type)
        ranges = self.included_ranges()
        return not ranges or data_type in ranges or self.super_properties() and \
               any(x.is_legal_object(data_type) for x in self.super_properties())