Ph.D. Thesis - Business Informatics Group

3.1.7 Package "Basic" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3.2 Discussion of the Generated WebML Metamodel . . . . . . . . . . . . . . . . . 47
3.2.1 Completeness Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3.2.2 Quality Metrics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4 Summary and Related Work 51
4.1 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
4.2 Related Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.2.1 Defining Metamodels for Web Modeling Languages . . . . . . . . . . . 52
4.2.2 Transforming between DTDs and Metamodels . . . . . . . . . . . . . . 53
4.2.3 Bridging Technical Spaces . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.2.4 Model Management: ModelGen Operator . . . . . . . . . . . . . . . . . 56
II Mapping 59
5 A Framework for Building Mapping Operators 61
5.1 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
5.2 Metamodel Bridging Framework . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.2.1 Overview of the Metamodel Bridging Framework . . . . . . . . . . . . 63
5.2.2 Mapping View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.2.3 Transformation View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
5.2.4 Implementation Architecture of the Metamodel Bridging Framework . 68
6 CAR – A Mapping Language for Resolving Structural Heterogeneities 71
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6.1 Motivating Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.2 Mapping Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.2.1 Overview of the CAR Mapping Language . . . . . . . . . . . . . . . . 72
6.2.2 Conditional C2C Mapping Operator . . . . . . . . . . . . . . . . . . . . 73
6.2.3 R2R Mapping Operator with Annotations . . . . . . . . . . . . . . . . . 75
6.2.4 A2C Mapping Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
6.2.5 R2C Mapping Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.2.6 A2R Mapping Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
6.3 An Inheritance Mechanism for Mapping Operators . . . . . . . . . . . . . . . 81
6.3.1 Inheritance for C2C Mappings . . . . . . . . . . . . . . . . . . . . . . . 82
6.3.2 Symmetric Mapping Situations . . . . . . . . . . . . . . . . . . . . . . . 83
6.3.3 Representing Inheritance within Transformation Nets . . . . . . . . . . 88
6.3.4 Asymmetric Mapping Situation – Hierarchy vs. Collapsed Hierarchy . 93
6.3.5 Multiple Inheritance for C2C Mappings . . . . . . . . . . . . . . . . . . 95