| Abstract | .... 2 | |
| Contents | .... 2 | |
| 1 | Introduction | .... 3 |
| 2 | Preliminaries | .... 3 |
| 2.1 | Bugs of Prolog Programs | .... 3 |
| 2.2 | "trace"Command in DEC-10 Prolog | .... 5 |
| 2.3 | "spy"Command in DEC-10 Prolog | .... 9 |
| 3 | Top-dwon Diagnosis of logic Programs | .... 9 |
| 3.1 | A Top-dwon Diagnosis Algorithm Using Treces | .... 9 |
| 3.2 | Top-dwon Diagnosis Algorithm Using Trees | .... 12 |
| 3.3 | Soundness and Completeness of the Top-dwon Diagnosis Algorithm | .... 16 |
| 4 | Top-dwon Zooming Diagnosis of Logic Programs | .... 19 |
| 4.1 | A Top-dwon Zooming Diagnosis Algorithm Using Traces | .... 20 |
| 4.2 | Top-dwon Zooming Diagnosis Algorithm Using Trees | .... 22 |
| 4.3 | Soundness and Completeness of the Top-dwon Zooming Diagnosis Algorithm | .... 23 |
| 5 | Imprementation of the Top-dwon Zooming Diagnosis Algorithm | .... 25 |
| 5.1 | Considerasion on Space Efficiency | .... 25 |
| 5.2 | Considerasion on Time Efficiency | .... 26 |
| 5.3 | Considerasion on Queries | .... 27 |
| 6 | Discussion | .... 29 |
| 7 | Conclusion | .... 31 |
| Acknowledgements | .... 31 | |
| References | .... 31 |
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