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Conference Papers Year : 2013

On the Semantics of Object-Oriented Data Structures and Path Expressions

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Abstract

UML/OCL is perceived as the de-facto standard for specifying object-oriented models in general and data models in particular. Since recently, all data types of UML/OCL comprise two different exception elements: invalid ("bottom" in semantics terminology) and null (for "non-existing element"). This has far-reaching consequences on both the logical and algebraic properties of OCL expressions as well as the path expressions over object-oriented data structures, i.e., class models. In this paper, we present a formal semantics for object-oriented data models in which all data types and, thus, all class attributes and path expressions, support invalid and null. Based on this formal semantics, we present a set of OCL test cases that can be used for evaluating the support of null and invalid in OCL tools.
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Dates and versions

hal-01214460 , version 1 (12-10-2015)

Identifiers

  • HAL Id : hal-01214460 , version 1

Cite

Achim D. Brucker, Delphine Longuet, Frédéric Tuong, Burkhart Wolff. On the Semantics of Object-Oriented Data Structures and Path Expressions. Proceedings of the MODELS 2013 OCL Workshop co-located with the 16th International ACM/IEEE Conference on Model Driven Engineering Languages and Systems (MODELS 2013), Sep 2013, Miami, United States. ⟨hal-01214460⟩
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