Storing and querying ordered XML using a relational database system
Proceedings of the 2002 ACM SIGMOD international conference on Management of data
Relational Databases for Querying XML Documents: Limitations and Opportunities
VLDB '99 Proceedings of the 25th International Conference on Very Large Data Bases
An automatic load/extract scheme for XML documents through object-relational repositories
Journal of Systems and Software
WebReader: a Mechanism for Automating the Search and Collecting Information from the World Wide Web
WISE '00 Proceedings of the First International Conference on Web Information Systems Engineering (WISE'00)-Volume 2 - Volume 2
| Hi-index | 0.00 |
The need for interoperation and data exchange through the Internet has made Extensible Markup Language (XML) a dominant standard language. Much work has already been done on translating relational data into XML documents and vice versa. However, there is not an integrated method to combine them together as a unifying technology for database interoperability on the Internet. Users may not be familiar with various query language syntax. We propose database gateways built on the top of a Relational Database (RDB) and an XML Database (XMLDB). Users can access both databases at the same time through the query language SQL or XQL (an XML query language) to access data stored in either RDB or XMLDB. The translation process adopts query graph translation between a RDB and an XMLDB. Thus, a stepwise procedure of query translation is devised and amenable to implementation. The procedure also provides an XML interface to a RDB as well as a relational interface to XMLDB. A location counter sequence number is used to position tuples in a RDB for subsequent transforming the tuples into the corresponding positioning element instances in the XML documents. As a result, both XMLDB and RDB can co-exist, and be accessible by the users.