• Journal of KIISE:Computing Practices and Letters
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• v.9 no.6
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• pp.610-622
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• 2003

Metadata Registry was developed to dynamically manage metadata and to increase interoperability between various and heterogeneous metadata. The built metadata registry can be used as a standard guideline for creation of new databases and it provides a radical data integration mechanism. However, in the situation that an enormous databases must be integrated progressively, there is a limit to the existing metadata-based approach. In case that each database has no statistical information for its use rate and the restricted cost is given to us for a unit time, existing metadata-based approaches do not provide how to select some databases to be preferentially integrated and to build a metadata registry progressively, In this paper, we propose a methodology that can create progressively metadata registries in the case. The proposed methodology is based on data visibility and hierarchical metadata registry. We also describe the system that have been developed for applying the methodology to a real domain, and then described its results.

• Journal of KIISE:Computing Practices and Letters
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• v.10 no.6
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• pp.472-483
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• 2004

Many metadata registry management systems have been developed, which are based on ISO/IEC ll179. However, they do not follow the international standard, ISO/IEC ll179 nor provide some of mandatory functions. It is difficult to a develop metadata registry management system for domestic environment because of their hidden implementations. The goals of this paper are to solve the problems of the existing systems and to develop a metadata registry management systems for accumulation of primitive technologies. This paper also shows the metadata registry building process for the science and technology information field using the developed system. This system consists of Metadata Registry Layer, Core Component Layer, Extension Layer, and Service Interface Layer. The developed metadata registry management system follows ISO/IEC ll179 and contains mandatory functions for practical use. Therefore, it can be used as a guideline for building metadata registries and a development process of metadata registry management systems. We can easily reuse its components for development of metadata registry management systems in various fields because the system is designed and implemented based on the component-based development methodology. It also decreases time and cost for developing systems.

• Journal of KIISE:Computing Practices and Letters
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• v.7 no.6
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• pp.614-629
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• 2001

As the information-intensive society in 21c based on the environment of global internet is promoted, the software is getting more large and complex, and the demand for the software is increasing briskly. So, it becomes an important issue in academic and industrial field to activate reuse by developing and exchanging the standardized component. Currently, the information services as a product type of each company are provided in foreign market place for reusing a commercial component, but the components which are serviced in each market place are different, insufficient and unstandardized. That is, construction for Component Data Registry based on ISO 11179, is not accomplished. Hence, the national government has stepped up the plan for sending out public component at 2001. Therefore, the systems as a tool for sharing and exchange of data, have to support the meta-information of standardized component. In this paper, we will propose the C_MDR system: a tool to register and manage the standardized meta-information, based upon ISO 11179, for the commercialized common component. The purpose of this system is to systemically share and exchange the data in chain of acceleration of reusing the component. So, we will show the platform of specification for the component meta-information, then define the meta-information according to this platform, also represent the meta-information using XML for enhancing the interoperability of information with other system. Moreover, we will show that three-layered expression make modeling to be simple and understandable. The implementation of this system is to construct a prototype system of the component meta-information through the internet on www, this system uses ASP as a development language and RDBMS Oracle for PC. Thus, we may expect the standardization of the exchanged component metadata, and be able to apply to the exchanged reuse tool.