Object-oriented schema extension and abstraction

Hürsch, Walter L.; Lieberherr, Karl; Mukherjea, Sougata

doi:10.1145/162754.162807

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…The semantics formally defines the order of wrapper execution for prefix and suffix wrappers. The feasibility of the evolution framework is demonstrated for a representative set of primitive class structure transformations, mainly based on the extension relations identified in [12], [18]. Such extension relations are useful means for quality control of schema transformations.…”

Section: Related Researchmentioning

confidence: 99%

The role of polymorphic reuse mechanisms in schema evolution in an object-oriented database

Liu

Zicari

Hürsch³

et al. 1997

IEEE Trans. Knowl. Data Eng.

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A seamless approach to the incremental design and reuse of object-oriented methods and query specifications is presented. We argue for avoiding or minimizing the effort required for manually reprogramming methods and queries due to schema modifications, and demonstrate how the role of polymorphic reuse mechanisms is exploited for enhancing the adaptiveness of database programs against schema evolution in an object-oriented database. The salient features of our approach are the use of propagation patterns and a mechanism for propagation pattern refinement. Propagation patterns are employed as an interesting specification formalism for modeling operational requirements. They encourage the reuse of operational specifications against the structural modification of an object-oriented schema. Propagation pattern refinement is suited for the specification of reusable operational modules. It promotes the reusability of propagation patterns toward the operational requirement changes. This approach has a formal basis and emphasizes structural derivation of specifications. The main innovations are in raising the level of abstraction for behavioral schema design, and for making possible the derivation of operational semantics from structural specifications. As a result, both the modularity and reusability of object-oriented schemas are increased.

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Section: Related Researchmentioning

confidence: 99%

The role of polymorphic reuse mechanisms in schema evolution in an object-oriented database

Liu

Zicari

Hürsch³

et al. 1997

IEEE Trans. Knowl. Data Eng.

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Object-extending class transformations

1994

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Reorganisation and evolution of class hierarchies is important for object-oriented system development and has received considerable attention in the literature. The contributions of this paper are: (1) a formal study of a set of extension relations and transformations on class hierarchies; (2) a presentation of a small set of primitive transformations which form a minimal and complete basis for the extension relations; and (3) an analysis of the impact of these transformations at the object level. The study leads to a better understanding of evolution and reuse of object-oriented software and class hierarchies. It also provides a terminology and a means of classification for design reuse. The theory presented in this paper is based on the Demeter data model, which gives a concise mathematical foundation for classes and their inheritance and part-of relationships. Parts of the theory have been implemented in the Demeter System TM C++, a CASE tool for object-oriented design and programming.

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Formal foundations for object-oriented data modeling

Lieberherr

Xiao

1993

IEEE Trans. Knowl. Data Eng.

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We give an axiomatic de nition of the basic structure, called a class dictionary graph, used by object-oriented designers and programmers during the software development process. The contributions of this paper are twofold: An axiomatic foundation for objectoriented data modeling and e cient algorithms for checking whether a given data model satis es the axioms. The presented data model is the foundation of a number of techniques for developing object-oriented systems including, schema abstraction from object examples, schema optimization, planning techniques for system development, application generation from propagation patterns, the Law of Demeter, etc. Keywords and Phrases: Object-oriented data modeling and programming, algorithms and tools for object-oriented design, axioms for data models, style rules for data engineering.

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Object-oriented schema extension and abstraction

Cited by 4 publications

References 7 publications

The role of polymorphic reuse mechanisms in schema evolution in an object-oriented database

The role of polymorphic reuse mechanisms in schema evolution in an object-oriented database

Object-extending class transformations

Formal foundations for object-oriented data modeling

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