HandlerChain

In the RH book I did not find a reference to a deployment descriptor having a 'handler-chain' element. It seems that when a chain of handlers is needed, you specify multiple 'handler' elements which are processed in the order as they are defined.

However, on this link: http://www.developer.com/services/article.php/10928_3503766_1 (given by MZ somewhere) you clearly see the definition of a 'handler-chain' in a 'web-service.xml' (don't know what that is, I only know the webservices.xml).

Any suggestions ?