| Index terms | .... 2 | |
| Abstract | .... 2 | |
| 1 | Introduction | .... 2 |
| 2 | Linguistic Constructions | .... 3 |
| 2.1 | Disjunctive Feature Structure(DFS) | .... 3 |
| 2.2 | Structural Principles | .... 4 |
| 3 | cu-Prolog | .... 5 |
| 3.1 | Conventional Approaches | .... 5 |
| 3.2 | Constrained Horn Clause(CHC) | .... 5 |
| 3.4 | PST | .... 6 |
| 3.5 | Modular:simplified form of constraint | .... 6 |
| 3.6 | Constraint Transformation | .... 7 |
| 4 | Implementation | .... 9 |
| 4.1 | Constraint Transformer | .... 9 |
| 4.2 | cu-PrologIII | .... 10 |
| 5 | Linguistic applications | .... 10 |
| 5.1 | Constraint-based NLP | .... 10 |
| 5.2 | DFS unification | .... 10 |
| 5.3 | Encoding Lexical Ambiguity | .... 11 |
| 5.4 | Encoding Structural Principle | .... 12 |
| 6 | Concluding Remarks | .... 12 |
| Acknowledgement | .... 13 | |
| References | .... 13 | |
| End | .... 16 |
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