The following links provide relevant information on Service-Oriented Architecture concepts, Enterprise Solutions webservices technology. http://www.service-architecture.com/
http://webservices.xml.com/pub/a/ws/2003/09/30/soa.html
http://www.sap.com/platform/soa/
http://www.microsoft.com/SOA/
http://www.oracle.com/technologies/soa/