Conference Paper

Role Organization Model in Hozo.

DOI: 10.1007/11891451_10 In proceeding of: Managing Knowledge in a World of Networks, 15th International Conference, EKAW 2006, Podebrady, Czech Republic, October 2-6, 2006, Proceedings
Source: DBLP

ABSTRACT The establishment of a computational framework of roles contributes effectively to the management of instance models because it provides us with a useful policy for treatment of views and contexts related to roles. In our research, we have developed an ontology building environment, which provides a framework for representation of roles and their characteristics. In this paper, as an extension of the framework, we present a framework for organizing roles according to their context dependencies. We especially focus on defining and organizing compound roles, which depend on several contexts.

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    ABSTRACT: Functionality is one of the key concepts of knowledge about artifacts. Functional knowledge shows a part of designer's intention (so-called design rationale), and thus its sharing among engineers plays a crucial role in team-activities in engineering practice. Aiming at promoting engineering knowledge management, we have developed an ontological modeling framework of functional knowledge, which includes an ontology of device and function and a controlled vocabulary. This framework has been successfully deployed in a manufacturing company in daily engineering activities. In the first part of this paper, we discuss some ontological issues concerning the functionality of artifacts, and redefine the notion of function as a role. In the second part, we discuss some lessons learned in the actual deployment of this framework and two extensions based on such experience. One extension is a lexical layer for functional terms intended to help engineers select appropriate functional concepts and to facilitate the use of domain-specific terms familiar to them. The other extension is the establishment of ontological modeling guidelines, which help engineers commit to the relevant ontologies and describe models compliant with them. Keywords: Engineering, ontologies, functionality, knowledge management, engineering design, role
    Applied Ontology. 01/2006; 1:237-262.
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    ABSTRACT: Ontologies are already used in the life sciences and the Semantic Web, but are expected to be deployed in many other areas in the near future—for exam- ple, in software development. As the use of ontologies becomes commonplace, they will be constructed more frequently and also become more complex. To cope with this issue, modularization paradigms and reuse techniques must be defined for ontologies and supported by ontology languages. In this paper, we propose the use of roles from conceptual modeling for this purpose, and show how they can be used to define ontological reuse units and enable modularization. We present role-based ontologies as an extension of standard ontologies and define their se- mantics through a reduction to standard Description Logics, such that existing reasoners can be used.
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    ABSTRACT: One of the major goals of ontology is to represent properly the underlying conceptual structure of the messy world reflecting the reality as much as possible. Ontology building tools should be designed to help developers create good ontologies. However, few of them can deal with roles adequately. Needless to say, the world is full of roles (e.g., wife, teacher, president, fuel, food, product, output, height) although there has been extensive theoretical research on roles, we do not yet have a comprehensive and usable theory yet. Our group has already constructed an ontology-development tool known as Hozo which has the ability to deal with roles. However, although Hozo allows users to represent roles better than other existing tools, the underlying theoretical foundations are still unclear and there is some room for improvement concerning the generality of how to deal with roles. In this paper, as an extension of the Hozo framework for roles, we present a framework for organizing role concepts according to their context dependencies. We also focus on the clarification of role properties and requirements on the model of roles and on the feedback obtained from Hozo-based ontology building experiences. Establishment of a computational model of roles contributes to building good ontologies because such a theory would provide useful guidelines for dealing with view-related and context-dependent distinctions related to roles.
    Applied Ontology. 01/2007; 2:159-179.

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