Kyu-Chul Lee

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Recently, several researches have been performed for updating XML documents[1][2][12] stored in databases. These researches define update operations and resolve some semantic problems. However, because the update operations are usually validated after execution, conflicts can occur among them. Furthermore, in many studies for updating, they just validate(More)
MOTIVATION Protein-protein interactions play critical roles in biological processes, and many biologists try to find or to predict crucial information concerning these interactions. Before verifying interactions in biological laboratory work, validating them from previous research is necessary. Although many efforts have been made to create databases that(More)
Service discovery is the first crucial step to compose services for building a business process. Much effort, mainly classified into syntactic and semantic approaches, has been given to make the current Web service discovery more precise and efficient. Semantic approach for Web services utilizes predefined concepts and relationships among their concepts to(More)
Advances in the areas of pervasive environments, computing, and networking are leading to an infrastructure composed of a large number of heterogeneous services/devices. Although some network protocols accommodate heterogeneity of services and/or devices, existing protocols have various design goals and solutions. This paper outlines a Ubiquitous Web(More)
We study the validation of XML documents when they are updated in XML databases. An XML document can be verified by checking against an XML Schema, which contains structure and type information of XML documents. However, most of XML database systems just validate the whole XML document, but can not validate parts of it. If updates are very frequent, then(More)