FUNCTION valid_units

(* SCHEMA associative_draughting; *)

  FUNCTION valid_units(
               m: measure_with_unit
      ): BOOLEAN;
    IF 'ASSOCIATIVE_DRAUGHTING.LENGTH_MEASURE' IN TYPEOF(m.value_component)
         THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(1,0,0,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.MASS_MEASURE' IN TYPEOF(m.value_component)
         THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,1,0,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.TIME_MEASURE' IN TYPEOF(m.value_component)
         THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,0,1,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.ELECTRIC_CURRENT_MEASURE' IN TYPEOF(m.
        value_component) THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,0,0,1,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.THERMODYNAMIC_TEMPERATURE_MEASURE' IN 
        TYPEOF(m.value_component) THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,0,0,0,1,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.AMOUNT_OF_SUBSTANCE_MEASURE' IN TYPEOF(m.
        value_component) THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,0,0,0,0,1,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.LUMINOUS_INTENSITY_MEASURE' IN TYPEOF(m.
        value_component) THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,0,0,0,0,0,1) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.PLANE_ANGLE_MEASURE' IN TYPEOF(m.
        value_component) THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,0,0,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.SOLID_ANGLE_MEASURE' IN TYPEOF(m.
        value_component) THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,0,0,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.AREA_MEASURE' IN TYPEOF(m.value_component)
         THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(2,0,0,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.VOLUME_MEASURE' IN TYPEOF(m.value_component)
         THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(3,0,0,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.RATIO_MEASURE' IN TYPEOF(m.value_component)
         THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,0,0,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.POSITIVE_LENGTH_MEASURE' IN TYPEOF(m.
        value_component) THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(1,0,0,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    IF 'ASSOCIATIVE_DRAUGHTING.POSITIVE_PLANE_ANGLE_MEASURE' IN TYPEOF(m.
        value_component) THEN
      IF derive_dimensional_exponents(m.unit_component) <> 
          dimensional_exponents(0,0,0,0,0,0,0) THEN
        RETURN(FALSE);
      END_IF;
    END_IF;
    RETURN(TRUE);

  END_FUNCTION; -- valid_units

Referenced By

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2012-03-27T17:14:12-04:00