adds a source for the schema defintion . concode_field_sep ArrayList<Source> sources concode_elem_sep JAXPValidator validator concode_field_sep boolean isSchemaValid concode_elem_sep List<SAXParseException> getInstanceErrors concode_elem_sep boolean isInstanceValid concode_elem_sep List<SAXParseException> problemToExceptionList concode_elem_sep List<SAXParseException> getSchemaErrors