| 1 | Introduction | .... 2 |
| 2 | Design Goal and Overview | .... 2 |
| 3 | Syntax and Semantics | .... 3 |
| 3.1 | Syntax | .... 3 |
| 3.2 | Semantics | .... 3 |
| 4 | Program Examples | .... 5 |
| 4.1 | Binary Merge | .... 5 |
| 4.2 | Generating Primes | .... 6 |
| 4.3 | Bounded Buffer Stream Communication | .... 6 |
| 4.4 | Meta-Interpreter of GHC | .... 6 |
| 5 | Important Features of GHC | .... 7 |
| 5.1 | Simplicity | .... 7 |
| 5.2 | Descriptive Power | .... 7 |
| 5.3 | Efficiency | .... 7 |
| 6 | Possible Extensions | .... 7 |
| 6.1 | Otherwise | .... 7 |
| 6.2 | Metacall Facilities | .... 8 |
| 6.3 | Metacall with communication | .... 8 |
| 7 | Implementation Outline | .... 9 |
| 8 | Comparison With Other Languages | .... 10 |
| 8.1 | Comparison with Concurrent Prolog and PARLOG | .... 10 |
| 8.2 | Comparison with Qute | .... 11 |
| 8.3 | Comparison with CSP[hoare78] | .... 11 |
| 8.4 | Comparison with (sequential)Prolog | .... 12 |
| 8.5 | Comparison with Delta Prolog | .... 12 |
| 9 | Conclusiona | .... 12 |
| Acknowledgments | .... 12 | |
| References | .... 13 |
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