7 IDL Specification of the MOE Grammar

 

The following is a specification of a set of classes in IDL (CORBA's Interface Definition Language) that is (roughly) equivalent to the representation described above. A slightly restricted modified version of this specification was adopted in the database schema of the JFACC Jumpstart program. Note that date is unspecified; we assume that most IDL schemas will have date specification classes that we can reuse.

// forward declarations

interface PlanEntity;
interface MeasureOfEffect;
interface Quantification;
interface PercentageChange;
interface TimeChange;
interface ChangeFromPreConflictLevels;
interface ChangeFromInitialValue;
interface ValueRestriction;
interface TimeValue;

// enumerations

enum ChangeVerb {
                    ChangeVerb_Degraded,
                    ChangeVerb_Reduced,
                    };

enum TimeChangeVerb {
                    TimeChangeVerb_Delayed
                    };

enum Restriction {
                    Restriction_AtMost,
                    Restriction_AtLeast
                    };

// class definitions

interface PlanEntity {};

interface MeasureOfEffect : PlanEntity {
    attribute MeasurableElement measurableElement;
    attribute Quantification quantification;
    attribute string textSpecification;
};

interface Quantification : PlanEntity {
};

interface PercentageChange : quantification {
    attribute ChangeVerb changeVerb;
    attribute float percentage;
};

interface TimeChange : quantification {
    attribute TimeChangeVerb changeVerb;
    attribute float percentage;
};

interface ChangeFromReferenceValue : PlanEntity {
    attribute ChangeVerb changeVerb;
    attribute float changePercentage;
    attribute ReferenceValue referenceValue;
};

interface ChangeFromInitialValue : PlanEntity {
    attribute ChangeVerb changeVerb;
    attribute float changePercentage;
    attribute float initialValue;
};

interface ValueRestriction : PlanEntity {
    attribute Restriction restriction;
    attribute short value;
};

interface ReferenceValue : PlanEntity {
};

interface PreConflictLevels : ReferenceValue {
};

interface KnownAtDate : PlanEntity {
    attribute date knownAt;
};

interface TimeValue : PlanEntity {
    attribute TimeUnits unit;
    attribute short value;
};

interface MeasurableElement : PlanEntity {
    attribute string text-specification;
};

interface Event : MeasurableElement {
};

interface Object : MeasurableElement {
};

interface Aspect : MeasurableElement {
};

interface Capability : MeasurableElement {
};