The Data Servives support feature of WSO2 WSAS [0] provides a mechanism through which data is taken in as relational databases, CSV files, Excel files, LDAP Servers and make them available as WS-* style Web services or as a set of REST style Web resources.

How To Use Data Services

1. How to use MySQL 5 INOUT variables in Data Services? - (http://wso2.org/blog/sumedha/3082 [0])
2. Bringing relational data into web - (http://wso2.org/library/2617 [0])
3. How to call MySQL 5 Stored Function from Data Service? - (http://wso2.org/library/2631 [0])
4. How to call MySQL 5 stored procedure from Data Services ? - (http://wso2.org/blog/sumedha/2623 [0] )
5. Getting started with Data Services using Oracle - (http://wso2.org/blog/sumedha/3051 [0] )
6. Getting started with Data Services using WSO2 WSAS-2.0 - (http://wso2.org/blog/sumedha/2573 [0] ) - using Derby as database
7. Getting started with Data Service Samples - Movie (http://wso2.org/blog/sumedha/2590 [0] ) - using Derby as database
8. How to use Data Service nested query feature - (http://wso2.org/blog/sumedha/3175 [0])
9. How to expose CSV file as a data service - (http://wso2.org/blog/sumedha/3158 [0])

10. How to expose Excel 97-2002 spreadsheet as a Data Service using WSAS - 2.0  - (http://wso2.org/blog/sumedha/2581 [1])

Other Resources

1. Data Sources as Web services -  (http://www.xml.com/pub/a/2007/10/25/data-sources-as-web-services.html) [2]
2. Data Services in SOA: Issues and Possible Solutions - (http://www.infoq.com/news/2007/11/data-services-in-soa;jsessionid=7BC59AD6C77B6037F9D96D8F44523933) [3]
3. Specification - (http://wso2.org/wiki/display/wsf/Data+Services+and+Resources) [3]