Abstract:Semantic data models have emerged from a requirement for more expressive conceptual data models. Current generation data models lack direct support for relationships, data abstraction, inheritance, constraints, unstructured objects, and the dynamic properties of an application. Although the need for data models with richer semantics is widely recognized, no single approach has won general acceptance. This paper describes the generic properties of semantic data models and presents a representative selection of … Show more
“…Semantic data modelling between these three classes can provide the integrated system within different views on data; which can represent the structured and non-structured data [12]. To realize the expected functionality, several types of class relations among sub-models can be defined.…”
“…Semantic data modelling between these three classes can provide the integrated system within different views on data; which can represent the structured and non-structured data [12]. To realize the expected functionality, several types of class relations among sub-models can be defined.…”
“…Many semantic data models have been proposed and they were reviewed in [29,51]. Briefly, semantic data models borrow constructs from knowledge representation and semantic modelling in the Artificial Intelligence field.…”
“…Similarity analysis of speci cations 2.1 Representation of speci cations: the Telos language Telos (Mylopoulos J. et al 1990), an object-oriented knowledge representation language, has been selected as the representation framework for similarity analysis. Telos supports three semantic modelling abstractions, namely classi cation, generalization and attribution (Hull R. andKing R. 1987, Peckham J. andMaryanski F. 1988). It treats entities and attributes uniformly as objects with equal rights.…”
Speci cations of requirements for new software systems can be revised, re ned or completed in reference to speci cations of requirements for existing similar systems. Although realized as a form of analogical problem solving, speci cation by reuse is not adequately supported by a vailable computational models for detecting analogies. This is chie y due to the following reasons: (1) It is assumed that speci cations are expressed according to the same speci cation model and in a uniform representation scheme. (2) Additional information is needed for the detection of analogies, which is not contained in the speci cations. (3) Performance scales poorly with the complexity of speci cations. This paper presents a computational model for detecting analogies, which addresses these issues to a certain extent. The application of the model in the speci cation of requirements by analogical reuse is demonstrated through an example, and its sensitivity to the representation of speci cations is discussed. Finally, the results of a preliminary empirical evaluation of the model are reported.
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