In many organizations, relational databases are the backbone for data storage and retrieval. Over the last couple of years, XML has become the de facto standard to exchange information between organizations, as well as between departments or applications within the same organization. Since data tends to live in databases, it needs to be converted from a relational format into an XML format when involved in those data exchanges, as well as converted (back) from XML into a relational format for storage, or for handling by other applications.
How can we achieve this? This IBM Redbooks publication describes how to design the mapping between XML and relational data, and vice versa, to enable a flexible exchange of information.
IBM provides a number of products to help you bridge the gap between XML and its relational database, DB2. The DB2 engine itself provides support to generate XML fragments from relational data through the use of SQL/XML built-in functions. DB2 also provides the DB2 XML Extender. It allows you to perform XML composition, like SQL/XML, but also provides functionality to decompose XML documents and store XML documents intact inside the database. XML Extender also provides a set of transformation and validation functions. Another option to work with XML is to use the XML wrapper, a part of the set of non-relational wrappers of DB2 Information Integrator. This book also looks at the IBM tools available to assist you when dealing with XML, specifically WebSphere Application Developer and DB2 Control Center.
To add a more practical angle, these functions and products are illustrated through the development of a simple application.
Table of contents
Part 1. Overview
Chapter 1. XML and databases
Chapter 2. XML services in DB2 and DB2 Information Integrator
Chapter 3. Designing XML and database schemas
Part 2. Processing XML documents
Chapter 4. Storing whole XML documents
Chapter 5. Working with XML documents stored in XML columns
Chapter 6. Shredding XML into relational tables
Chapter 7. Bulk processing of XML documents
Chapter 8. Publishing data as XML
Chapter 9. Additional XML functionality
Chapter 10. Web services in DB2
Chapter 11. XML wrapper
Part 3. XML tools for database systems
Chapter 12. XML and database tools in Application Developer
Part 4. Worked examples
Chapter 13. Worked scenario
Chapter 14. Scenario implementation using DB2 functionality
Chapter 15. Scenario with Application Developer tools
Chapter 16. DB2 Web services and XML with Application Developer
Chapter 17. Deployment of DB2 Web services
Appendix A. Installation
Appendix B. Introduction to XML
Appendix C. Table-based and object-relational mappings
Appendix D. DAD DTD reference
Appendix E. Sample XML Tools
Appendix F. Additional material