SWIM

SWIM is a knowledge-based system for building Web Service Domains, which are collections or communities of related Web Services that are mediated and/or aggregated by a single Web Service, called the Mediator Service that functions as a proxy for them. When a requestor sends a message to the Mediator Service our system will select one or more of the Web Services to dispatch the message and will fuse the results returned by the selected services. The selection of Web services and the algorithm for fusing the results is defined by the administrator of the Service Domain using a declarative rule language, called X-DEVICE. SWIM system offers services for registering new Web Services and Service Domains. The main advantage of the SWIM system, compared to similar proposed approaches is that it allows the easy definition of arbitrary service selection strategies using a logic-based language. Furthermore, it goes beyond the mere conditional re-routing of Web Service requests by allowing combination of results of multiple Web Services leading to a simple logic-based form for Web Service composition.

WSDL Descriptions for SWIM Services

• Service to Register a Service Domain
  • DTD for Service Domain metadata
  • Sample Service Domain metadata
• Service to Register a Mediator Service
  • DTD for Mediator Service metadata
  • Sample Mediator Service metadata
• Service to Register a Web Service
  • Sample SOAP message for registering a Web service
  • DTD for Web service metadata
  • Sample Web service metadata
• Sample Mediator Service
  • XML Schema for input/output messages
  • Sample input SOAP message for a Mediator Service
• Sample Web Service
  • XML Schema for input/output messages
  • Sample input SOAP message for a Web Service

Courier Company Example

• WSDL descriptions for all the Mediator services and Web Services of the courier company example.
• DTDs of the metadata that are kept for the services that comprise the SWIM system, along with metadata of the courier company example.

Relevant Publications

• Bassiliades N., Vlahavas I., "A Knowledge-based Framework for Building Web Service Domains", submitted at 9th Panhellenic Conference on Informatics (PCI'2003), Thessaloniki, 21-23 November 2003.
• G. Tsoumakas, N. Bassiliades, I. Vlahavas, "A Knowledge-based Web Information System for the Federation of Distributed Classifiers", accepted for publication at Web Information Systems, D. Taniar, W. Rahayu (eds.), Idea-Group Publishing, 2004.
  

For any comments regarding this page contact Nick Bassiliades.