1. Chapter 19: Semantic Service Selection Service-Oriented Computing: Semantics, Processes, Agents – Munindar P. Singh and Michael N. Huhns, Wiley, 2005

2. Chapter 192Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns Highlights of this Chapter Semantic Matchmaking An Advertising and Matchmaking Language Selecting Services SoCom Matchmaking

3. Chapter 193Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns Discovery versus Selection The purpose behind discovering a service is to select a good one We don’t need to find all services Just the one that’s best for us! By focusing on selection, we can Improve the payoff Reduce overhead from trying irrelevant or less relevant services

4. Chapter 194Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns Where Does Selection Apply? Service users and providers looking for each other Brokers looking for both users and providers Markets to be populated with participants Spheres of Commitment or organizations to be instantiated The situation is fundamentally symmetric Peer to peer Not client-server

5. Chapter 195Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns Semantic Matchmaking Match using an ontology Domain of a service Preconditions and effects of methods Use ontologies to reformulate queries and generate query plans by Generalizing or specialize concepts Partitioning concepts Decomposing properties

6. Chapter 196Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns Matchmaking Language Describing services and formulating service requests involves Provenance and ownership Cost Service agreements (e.g., refundable?) Resource requirements Availability: geographic, temporal, … Payment mechanisms Empirical, evaluative aspects (Chapter 20)

7. Chapter 197Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns Semantic Team Matchmaking Represent commitments and capabilities Define abstract spheres of commitment (SoComs) in terms of roles, e.g., specification underlying eBay: Capabilities: can issue quote and ship, can pay Commitments: will honor price quote; will pay To adopt a role, an agent must Possess the capabilities Acquire the commitments

8. Chapter 198Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns Consumer and Provider Agents SoComs provide the context for concepts represented & communicated

9. Chapter 199Service-Oriented Computing: Semantics, Processes, Agents - Munindar Singh and Michael Huhns Chapter 19 Summary Service selection is key in SOC Involves suitably rich representations of Services Services requested or desired More than two-party, client-server: Formation of SoComs to solve complex business problems