boolean  IsStandardToken(char data){

	        //Pre:

		//Post:

		 if ( data >='a' && data <= 'z' ||

        	        data >='A' && data <= 'Z' ||

                	data >= '0' && data <='9' ||

	                data == '_' ||

			data == '.'  ||

                         data == '-')

        	        return true;

        	else

                	return false;

                                                                                                                             

	}//