Pizza and a movie 2002 aamas

1. Pizza and a Movie A Case Study in Advanced Web Services Dr Luigi Ceccaroni Dr Jonathan Dale Network Agent Research Group Fujitsu Laboratories of America July, 2002

3. © 2002 Fujitsu Laboratories of America Introduction • Advanced Web Services (WS++) – Communicate on wide-area networks, such as the Internet. – Have explicit representation of the capabilities offered. – Support semantically grounded communication. – Are reusable in different contexts and situations. – Are published, discovered through agreed registry mechanisms. – Are invoked through interactive and dynamic interfaces. • Agents – Advertise their existence. – Establish communications with other agents. – Describe their function, input and output requirements. – Negotiate an exchange of data and services. – Cooperate in the completion of a task.

4. © 2002 Fujitsu Laboratories of America The Evening Organizer • Part of Agentcities.RTD composite services • Uses various domain services such as:  Weather  Cinema  Hotel  Restaurant  Taxi • Application for San Francisco • Part of an envisioned pervasive-computing infrastructure (location and context-aware services) • AAP based

5. © 2002 Fujitsu Laboratories of America The Evening Organizer Personal Assistant Agent User Evening Organizer Gather User Preferences Initiate Evening Planning Task Compose Itinerary Gather Review Information Gather Ratings Information Refine Itinerary Gather Service Information Propose Itinerary Seek Approval of Itinerary Approve Itinerary Modify Itinerary Cancel Itinerary Make Itinerary Reservations Make Itinerary Reservations Propose Itinerary with Reservations Seek Approval of Itinerary with Reservations Approve Itinerary Modify Itinerary Cancel Itinerary Book Itinerary Reservations 1 2 3 4 5 6 7a 8 9 10a 7b 10b The user can monitor booking execution

6. © 2002 Fujitsu Laboratories of America Initiating an evening organization task A user wants to go to a restaurant to eat a pizza and then go to a cinema to see a Sci-Fi movie. The user is guided, via Web forms, towards a Restaurant and Shows template. (Restaurant (typeOfCuisine:Cuisine = Pizza) Shows = CinemaShow (show:Performance (genre:string = Sci-Fi)))

8. © 2002 Fujitsu Laboratories of America Composing an itinerary The personal agent (PA) expands the instantiated template into an instantiated itinerary (Web Services selection and composition). (Taxi (source:string = UserHome) Restaurant … Taxi … Shows … Taxi (destination:string = UserHome))

10. © 2002 Fujitsu Laboratories of America Restaurant service JTP Knowledge BASE Restaurant Booking Agent KIF Evening Organizer QUERY-REF INFORM REQUEST INFORM-DONE Extended-FIPA-SL Extended-FIPA-SL SQL SQL database Restaurant Finder Agent HTML (Web) DAML+OIL DAML-S Restaurant services

11. © 2002 Fujitsu Laboratories of America Grounding for Web Services invocation (Finder Agents) (QUERY-REF :sender ( agent-identifier :name PaulOakenfold@bo.agentcities.net:1099 :addresses (sequence http://bo.agentcities.net:7778 )) :receiver (set ( agent-identifier :name restaurant@sf.us.agentcities.net :addresses (sequence http://sf.us.agentcities.net:8080/acc ))) :content "( (all ?r1 (and (instance ?r1 daml-s#serviceProfile) (= (value ?r1 restaurant#CuisineType) "restaurant#Pizza") ) ) )" :language extended-FIPA-SL :ontology (sequence daml-s:http://.../onto1 restaurant:http://...onto3) :protocol fipa-query)

13. © 2002 Fujitsu Laboratories of America Grounding for Web Services invocation (Booking Agents) (REQUEST :sender ( agent-identifier :name PaulVanDyk@bo.agentcities.net:1099 :addresses (sequence http://bo.agentcities.net:7778 )) :receiver (set ( agent-identifier :name beryl@sf.us.agentcities.net :addresses (sequence http://sf.us.agentcities.net:8080/acc )) ) :content "(action ( ( agent-identifier :name AnticaTrattoria@sf.us.agentcities.net :addresses (sequence http://sf.us.agentcities.net:8080/acc ))) (process#booking :restaurant#howmany 8 :restaurant#when "2002-06-17-1630" ))" :ontology (sequence process:http://.../onto2 restaurant:http://...onto3) :language extended-FIPA-SL :protocol fipa-request-protocol)

15. © 2002 Fujitsu Laboratories of America Final form of the itinerary (Taxi (source:string = UserHome) (destination:string = Ft. Mason Ctr., A) Restaurant = Antica Trattoria (seating:RestaurantSeating = Indoor) (typeOfCuisine:Cuisine = Pizza) Taxi (source:string = Ft. Mason Ctr., A) (destination:string = 1345 Bush St) Shows = CinemaShow (show:Performance (title:string = Barbarella) (genre:string = Sci-Fi)) (location:EventHost (name:string = Alliance Française)) Taxi (source:string = 1345 Bush St) (destination:string = UserHome))

17. © 2002 Fujitsu Laboratories of America Conclusions • EO: a simple process (black-box) expanding to a composite process • Personal Agent: interface between user and EO • Dynamic input: Web form filled out by the user, user preferences • Conditional output: Complete itinerary with reservations booked and tickets purchased, or itinerary partially organized, or failure and error message • Future work: – DAML-S version advertising properties and capabilities through a profile description, and providing a grounding consistent with DAML-S 0.7 – Integration with a logic-based content language to be compatible with the requirements of semantic agent communication within Agentcities – Restaurant, cinema and taxi services

18. © 2002 Fujitsu Laboratories of America Challenges (addressed by Agentcities) • Semantic interoperability, use of ontologies • Need for standard searching mechanisms and service classification • Tools, frameworks and methodologies, to help the software-agent developer • Dynamic, intelligent and autonomous composition of services

19. © 2002 Fujitsu Laboratories of America Availability Details (September 2002) The Evening Organizer for San Francisco http://sf.us.agentcities.net/ Luigi Ceccaroni, Jonathan Dale lc@fla.fujitsu.com Restaurant services: http://sf.us.agentcities.net/aap/RestaurantServiceDescription.htm AAP on SourceForge.net: http://www.sourceforge.net/projects/networkagent

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