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A number of research efforts have been proposed to address this problem, ranging from mediator-based systems, description logic-based systems to content-descriptive metadata systems. In this paper, we propose a metadata dictionary as an assistant mechanism for solving semantic heterogeneity. The proposed metadata dictionary is designed based on domain ontology where the constituent components are defined in terms of object-oriented and set theory. An XML-based data model is employed to manipulate and express the metadata dictionary contents. The inherent flexibility of XML technology permits systemwide interoperability suitable for a web-based environment.<\/jats:p>","DOI":"10.1177\/01655515030295003","type":"journal-article","created":{"date-parts":[[2003,10,25]],"date-time":"2003-10-25T20:27:16Z","timestamp":1067113636000},"page":"357-374","source":"Crossref","is-referenced-by-count":11,"title":["A Semantic Information Gathering Approach for Heterogeneous Information                 Sources on WWW"],"prefix":"10.1177","volume":"29","author":[{"given":"Ngamnij","family":"Arch-Int","sequence":"first","affiliation":[{"name":"Advanced Virtual and Intelligent Computing (AVIC) Research Centre,                         Chulalongkorn University, Bangkok, Thailand,"}]},{"given":"Peraphon","family":"Sophatsathit","sequence":"additional","affiliation":[{"name":"Advanced Virtual and Intelligent Computing (AVIC) Research Centre,                         Chulalongkorn University, Bangkok, Thailand"}]}],"member":"179","published-online":{"date-parts":[[2003,10,1]]},"reference":[{"key":"atypb1","doi-asserted-by":"publisher","DOI":"10.1145\/96602.96604"},{"key":"atypb2","doi-asserted-by":"publisher","DOI":"10.1109\/2.121508"},{"key":"atypb3","doi-asserted-by":"publisher","DOI":"10.1023\/A:1008683107812"},{"key":"atypb4","first-page":"513","volume-title":"Proceedings of the 11th International Conference on Data Engineering","author":"S. 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