SWS - is Semantic Web Service.
SAWSDL - is Semantic Annotations for WSDL.
So, you cannot look into it, as a subset or something.
SWS - is a conecpt under Semantic Web, of having semantics for describing services. While, the Semantic Annotations for WSDL and XML Schema (SAWSDL) is a W3C Recommendation which defines mechanisms using which semantic annotations can be added to WSDL components.
Reference: SAWSDL - W3 Working Group
I hope this clarifies.
[QB]Can someone please briefly point out the fundamental difference between these two concepts....
is there a difference?
is SAWSDL a subset of SWS ?