Coupling rules to an object-oriented program

• US 5,644,770 A
• Filed: 03/08/1995
• Issued: 07/01/1997
• Est. Priority Date: 09/28/1990
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Roth, Richard C., Carlson, Keith O., Burke, Fred H.
• Primary Examiner(s): Kriess, Kevin A.
• Assistant Examiner(s): Chaki, Kakali
• Application Number:
  US08/400,943
• Time in Patent Office: 846 Days
• Field of Search: 395/500, 395/700
• US Class Current: 717/166
• CPC Class Codes: G06F 8/315 Object-oriented languages
• CPC Class Codes: G06F 9/4496 Unification in logic programming

Abstract

A method of coupling rules to a data domain of an object-oriented computer program. During run time, the coupling permits the computer to use rules to directly access user-defined objects for both the matching and the action phases of the inferencing process, Inferencing is implemented with an inference class object and user-defined class object are derived from a working memory element class.

Claims

1. A method of using a computer for rule inferencing from an object-oriented data domain of user-defined objects, comprising the steps of:

instantiating a rule, from a program having an object-oriented data domain, as an inference class object;

inheriting at least one user-defined object, to be used by said rule for inferencing, from a working memory element class;

instantiating said user-defined class object from which said rule will inference; and

inferencing with said rule, wherein a matching phase of said inferencing directly accesses said user-defined class object.

2. The method of claim 1, wherein said inferencing step further comprises the step of directly accessing said user-defined class object for an action phase of said inferencing.

3. The method of claim 2, wherein said manipulating accessing step is performed by executing code in the same language as said object-oriented data domain.

4. The method of claim 1, and further comprising the step of explicitly selecting said user-defined class object for inferencing.

5. The method of claim 1, wherein said step of instantiating said user-defined class object implicitly makes said user-defined class object available for inferencing.

6. The method of claim 1, wherein said inference class object is a data structure having data that links to a rules data structure and a condition element data structure.

7. The method of claim 6, wherein space for said condition element data structure and said rules data structure is allocated according to a rule-set data file.

8. The method of claim 1, and further comprising the step of associating a time stamp with said user-defined class object, using said working memory element class.

9. The method of claim 1, and further comprising the step of tracking state information of condition elements of said rule.

10. The method of claim 1, wherein said inheriting step includes generating a pointer to said user-defined class object and placing said pointer on a pointer list.