Webservices implementation via SOA

Web Services have become the preferred implementation technology for realizing SOAs [34].
Their success is due to basing their development on existing, ubiquitous infrastructure such as
HTTP, SOAP, and XM

What is UDDI and WSIL

A very well written article: http://www.onjava.com/pub/a/onjava/2002/10/16/wsil.html

Great Article on SOAP vs REST

Very nicely written article from Mike Rozlog about REST and SOAP. :

http://edn.embarcadero.com/article/40558