NDLI: A comprehensive solution to the XML-to-relational mapping problem

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A comprehensive solution to the XML-to-relational mapping problem

Content Provider	ACM Digital Library
Author	Amer-Yahia, Sihem Freire, Juliana Du, Fang
Abstract	The use of relational database management systems (RDBMSs) to store and query XML data has attracted considerable interest with a view to leveraging their powerful and reliable data management services. Due to the mismatch between the relational and XML data models, it is necessary to first shred and load the XML data into relational tables, and then btranslate XML queries over the original data into equivalent SQL queries over the mapped tables. Although there is a rich literature on XML-relational storage, none of the existing solutions addresses all the storage problems in a single framework. Works on mapping strategies often have little or no details about query translation, and proposals for query translation often target a specific mapping strategy. XML-storage solutions provided by RDBMS also have limitations. Notably, they are tied to a specific backend and use proprietary mapping languages, which not only may require a steep learning curve, but often are unable to express certain desirable mappings. In order to address these limitations, we developed ShreX, a XML-to-relational mapping framework and system that provides the first comprehensive and end-to-end solution to the relational storage of XML data. Mappings in ShreX are defined through annotations to an XML Schema. The use of XML Schema simplifies the mapping process, since it does not require users to master a new specialized mapping language. The use of annotations allows mapping choices to be combined in many different ways. As a result, ShreX not only supports all the mapping strategies proposed in the literature, but also new useful strategies that had not been considered previously. ShreX provides generic (and automatic) document shredding and query translation capabilities; and it is portable --- its mapping specifications are independent of the database backend.
Starting Page	31
Ending Page	38
Page Count	8
File Format	PDF
ISBN	1581139780
DOI	10.1145/1031453.1031461
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2004-11-12
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Mapping techniques Xml storage Relational databases Xml shredding
Content Type	Text
Resource Type	Article

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