1. Adaptibility Patterns of Multi-Agent Organizations
Oguz Dikenelli, R.Cenk Erdur
Ege University
Computer Engineering Department

2. The Concept of Organizational Adaptibility
Organizational adaptibility can be defined as the capability of the organization to handle dynamic and unpredictible changes in the organization’s global knowledge
To handle Organizational Adaptibility, Developers need to
Understand this problem
Define required agent interactions and responsibilities for a specific adaptibility requirement during the desing

3. A Common Terminology to Define Adaptibility Patterns- A High Level Architectural View of MAS

4. Ontology Perception Pattern (OPP)
Intent - OPP defines how agent organization adapts itself when the structure of the global ontology changes or new ontology is added to the organizations at run-time
Motivation
In an adaptive environment, global ontologies may change at run time
At any time new ontologies added to the organization

5. OPP-Continue
Interaction Mechanism And Responsibilities

6. OPP-Continue (Responsibilities of Participating Agents)
Agent Type
Responsibilities
Directory Facilitator
Handle the request coming from the OA
Search the agents that use the ontology of interest
Inform OA about the availability/unavailability of the requested agents
Ontology Agent
Understand ontological changes
Query DF for agents that support ontology of interest
Inform the related agent(s) about the new ontology
Package and transfer the new ontology to the related agent
Agent
Build a request for ontology transfer
Handle the new ontology coming from the OA
Localize the new Ontology

7. OPP-Continue (Concurrent Task Diagram of the Agent Role)

8. Society Merging Pattern (SMP)
Intent – SMP defines how different organizations adapt themselfs to each other’s global knowledge at run-time
Motivation – There can be hundreds of independent agent organizations providing similar services based on different ontologies. Conspiciously, each organizationmay gain additional benefits using the services of the similar organizations.

9. SMP-Continue (Extended High Level Architectural View)

10. SMP-Continue (Interaction Mechanism)

11. SMP-Continue (Responsibility of Participating Agents)
META-DF
Manage the meta ontology
Search the societies that provide the requested capability
Inform the related DFs about the entry of a new society DF
Advertise the capability of the society to META-DF
Request the adress of the OA from other DF
Inform the address of own OA to the requested DFs
Inform the OA about the new society OA
Build a request for ontology transfer
Package and transfer the own ontology
Handle the coming ontology
Localize the coming ontology

12. Current Status
We have implemented the OPP by defining the required plans and inserting these plans in to a FIPA compliant agent framework
OA transfers DAML based ontologies in the content of the FIPA ACL.
Two different localize behaviors are implemented
one for ontology to relational db mapping
The other one for user interface creation

13. Conclusion
In this paper, we introduce two patterns for organizational adaptibility
Now, we are working to identify new adaptibilty requirements for pattern identifications and to extend the funtionality of agent framework for adaptibility support.