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XML is universally recognized as the standard document format for the purpose of interchange and device-independent presentation. Literature shows many eeorts towards the development of formal and conceptual models for XML, although no commonly accepted model exists as yet. In this paper, we present a s u r v ey of some formal and conceptual modeling(More)
Conference scheduling requires presentations scheduled to minimize the conflict between sessions that participants are interested to attend. Sampson [1, 2] provides a solution wherein attendee preference information is used to maximize session attendance and minimize conflicts. We improve Sampson's PBCS by developing a bi-criterion approach to set up two(More)
AbstrAct This article introduces a measurement ontol-ogy for applications to Semantic Web applications , specifically for emerging domains such as microarray analysis. The Semantic Web is the next-generation Web of structured data that are automatically shared by software agents, which apply definitions and constraints organized in ontologies to correctly(More)
Being able to express and enforce role-based access control on XML data is a critical component of XML data management. However, given the semi-structured nature of XML, this is non-trivial, as access control can be applied on the values of nodes as well as on the structural relationship between nodes. In this context, we adopt and extend a graph editing(More)
The WWW has a great potential of evolving into a globally distributed digital document library.The primary use of such a library is to retrieve information quickly and easily. Because of the size of these libraries , simple keyword searches often result in too many matches. More complex searches involving boolean expressions are diicult to formulate and(More)
When describing Web services, one of the obvious aspects that needs representing is Quality of Service " (QoS), the capability of a Web service to meet an acceptable level of service as per factors such as availability and accessibility. However too much of a focus on developing functional QoS ontologies has led to an over-emphasis on representing solely(More)