IFact Interface

ICloneable
IECSInterfaces.IFact
IEFacts.TFact

Delphi

type
  IFact = interface( ICloneable )
  ['{2D42CCE4-D296-11D3-B9BB-00C04F8EDA5F}']
  end;

	Name	Description
	AsString	Returns a string representation of the fact
	HashCode	Returns a hash code used by the rete network (TReteNetwork) to more efficiently retrieve facts from the network
	ID	Tracks the ID of the fact. Every fact within the inference engine gets assigned a unique id (NewFactId method)
	SlotNames	Returns an iterator which retrieves the slot names for the fact one by one
	SlotValues	Returns an iterator for values of all the fact slots in the fact.
	Template	Tracks the fact template that this fact is based on
	ToIDString	Returns a string representation of the fact appended to its ID
	Value[TIEName]	Gets and sets value for the slot identified by the index (slot name)

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	Name	Description
	AssignValues(IFact)	Copies the values from the parameter fact to the current fact. Their fact templates must be the same. The Values is cloned, not copied directly
	ContainsKey(String)	Checks to see if the fact contains a slot with the specified index. If it does, it returns the value in the slot, which may be the default value from the fact template. If the slot doesn't exist, the function returns nil
	GetHashCode	Accessor method for HashCode property
	GetID	Accessor method for ID property
	GetSlotNames	Accessor method for SlotNames property
	GetSlotValues	Accessor method for SlotValues property
	GetTemplate	Accessor method for Template property
	GetToIDString	Accessor method for ToIDString property
	GetValue(TIEName)	Accessor method for Value property
	get_AsString	Represents method get_AsString.
	get_HashCode	Represents method get_HashCode.
	get_ID	Represents method get_ID.
	get_SlotNames	Represents method get_SlotNames.
	get_SlotValues	Represents method get_SlotValues.
	get_Template	Represents method get_Template.
	get_ToIDString	Represents method get_ToIDString.
	get_Value(TIEName)	Represents method get_Value(TIEName).
	SetID(Integer)	Accessor method for ID property
	SetTemplate(IFactTemplate)	Accessor method for Template property
	SetValue(TIEName,IIEValue)	Accessor method for Value property
	set_ID(Integer)	Represents method set_ID(Integer).
	set_Template(IFactTemplate)	Represents method set_Template(IFactTemplate).
	set_Value(TIEName,IIEValue)	Represents method set_Value(TIEName,IIEValue).
	ToString	Returns a string representation of the fact

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Facts define the known knowledge about a expert system. If the IFactTemplate interface defines the fact class structure, the IFact interface defines an instance of a fact class. The inference engine uses facts and rules (TRule object) to generate new facts.

The TFact class implements this interface for the IECS

Reference

•IECSInterfaces

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Reference