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Title: Global schema generation and query rewriting XML integration
Authors: YANG XIA
Keywords: schema generation, query rewriting, XML integration
Issue Date: 29-Apr-2005
Citation: YANG XIA (2005-04-29). Global schema generation and query rewriting XML integration. ScholarBank@NUS Repository.
Abstract: While the Internet has facilitated access to information sources, the task of scalable integration of these heterogeneous data sources remains a challenge. In the thesis, we address two issues in XML integration. The first issue is global schema generation. We introduce a semantic approach for integration of XML schemas. We employ a data model called the ORA-SS (Object-Relationship-Attribute Model for Semi-Structured Data) to capture the implicit semantics in an XML schema. The second issue is query rewriting. Queries on an integrated schema need to be rewritten to query the underlying source repositories. We develop an algorithm for rewriting queries that take the semantic relationship between the source schemas and the integrated schema into account. Our query rewriting approach is based on ORA-SS model. This guarantees that the rewritten queries give the expected results, even where the integrated schema is quite complex.
Appears in Collections:Master's Theses (Open)

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