Techniques for mapping XML Schema into Object Relational Schema

Abstract

XML is popularly used as the de-facto standard for exchanging data between information systems. Storage and access to such XML encoded data is needed. Many approaches have been proposed: (i.) Storing XML data in its native form (native XML databases), (ii.)Use of existing DBMSs to store XML encoded data (XML-enabled databases). ORDBs integrate the rich object-oriented modeling capabilities as well as leverage the mature relational database technologies in storing and accessing data. Therefore, use of ORDBs to store XML encoded data enables us to exploit these rich powerful features. We believe that extracting semantics in mapping XML schema to ORDB schema provides better ORDB schema exploiting rich modeling capabilities. This is especially useful in storing large amounts of structured XML data. In this thesis, we outline techniques to identify superclass/subclass relationship in XML Schema. In addition, we propose guidelines to map XML schema to ORDB schema exploiting the superclass/subclass relationship. Finally we evaluate our work with the existing work and show the significance of extracting semantics in the mapping process.