There are many but the core basics that comes to my mind is
- Request/Response (message based patterns)
- Service Locator
- Service Composability (based on composition)
- Brokered Authentication
- Proxy (generated as well as manual)
Hope this helps.
Rajesh Pillai, Feb 20, 2011
There is no limitation in theoretically but when comes to Practical in one site they mention that better to define maximum of 12 operations in Contract.
Manjunath Be, Jan 31, 2011