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An MDA-based Approach for Facilitating Adoption of Semantic Web Service Technology. Dr. Gerald Gannod – [email protected] Division of Computing Studies and Dept. of Computer Science & Engineering Arizona State University John T.E. Timm – [email protected]

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An mda based approach for facilitating adoption of semantic web service technology l.jpg

An MDA-based Approach for Facilitating Adoption of Semantic Web Service Technology

Dr. Gerald Gannod – [email protected]

Division of Computing Studies and

Dept. of Computer Science & Engineering

Arizona State University

John T.E. Timm – [email protected]

Dept. of Computer Science & Engineering

Arizona State University

EDOC 2004 - MDSW Workshop


Introduction l.jpg
Introduction Web Service Technology

  • Semantic Web Services

    • Semantic Web Service = Web Service + Semantic Description (service ontology)

    • Enables better search, discovery, selection, composition and integration

    • Steep learning curve and lack of tool support provide a barrier for widespread adoption

EDOC 2004 - MDSW Workshop


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Introduction Web Service Technology

  • Model-Driven Architecture (MDA)

    • Centered on development of models rather than program code

    • Primary goals include portability, interoperability and reusability

    • Focuses on using standard widely-adopted languages (e.g. UML)

EDOC 2004 - MDSW Workshop


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Introduction Web Service Technology

  • Software Product Lines

    • Share common, managed set of features

    • Strategic reuse of core assets including: source code, requirement specifications, software architectures, design models, test cases and processes

    • Benefits include: large-scale productivity gains, shorter time-to-market, higher product quality, increased customer satisfaction, decreased development and maintenance costs

EDOC 2004 - MDSW Workshop


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Introduction Web Service Technology

  • Previous Work

    • Dynamic service integration using Jini

    • Software specification using ACME

    • Automatic generation of glue code

    • Code generation using XMI and XSLT

  • Current Work

    • Uses similar approach

    • Web services are assets within a product-line architecture

    • Use MDA to enable OWL-S generation and product development

EDOC 2004 - MDSW Workshop


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Contributions Web Service Technology

  • Primary

    • Development of an approach which facilitates the adoption of semantic web service technologies using MDA techniques

  • Secondary

    • Development of tools that generate semantic descriptions for web services

    • Development of a framework for web service composition via the use of product line approaches

EDOC 2004 - MDSW Workshop


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Approach Web Service Technology

  • Philosophy

    • Development of semantic descriptions for web services should not require knowledge beyond that of UML

  • Requirements

    • Use both standard web services and semantic web services

    • Facilitate the composition of services to form applications

EDOC 2004 - MDSW Workshop


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Approach Web Service Technology

  • Process

    • Product-line strategy to facilitate service composition

    • Characterize a family of products within a product-line

    • Variability in products must be configured to meet specific requirements

EDOC 2004 - MDSW Workshop


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Approach Web Service Technology

EDOC 2004 - MDSW Workshop


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Approach Web Service Technology

  • E-Learning Domain Example

    • Domain Expert and Software architect create a service ontology

    • Architect creates a product-line architecture for the E-Learning domain

    • Domain expert identifies potential services to populate the product-line architecture

EDOC 2004 - MDSW Workshop


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Approach Web Service Technology

  • E-Learning Domain Example

    • Software developers create product-line framework for E-Learning (reusable core assets)

    • Developers also create services which support operations such as test/quiz management and content delivery

    • Finally, developers create the mediator which handles the mappings between the product-line architecture and specific service implementations using the service ontologies

EDOC 2004 - MDSW Workshop


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Approach Web Service Technology

  • Tools

    • Our focus is on creating tools which support this process by creating semantic descriptions of the service collaborations using OWL-S

    • We are looking at converting UML activity diagrams to OWL-S ServiceModel

    • Software architect and domain expert can focus on models rather than code

    • Have already built tools to perform lightweight syntactic matching of services

EDOC 2004 - MDSW Workshop


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Approach Web Service Technology

  • Once the product-line framework is in place, the domain expert can focus on creating new products by populating the framework with services

  • This should not require programming knowledge on the part of the domain expert

EDOC 2004 - MDSW Workshop


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Discussion Web Service Technology

  • The use of ontologies to describe the domain enable mapping and interchangeability of services

  • In order to avoid the learning curve and facilitate adoption of semantic web technologies, MDA-based techniques are utilized leveraging existing developer knowledge (UML)

EDOC 2004 - MDSW Workshop


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Conclusions and Further Investigations Web Service Technology

  • We are looking at alternative approaches (e.g. top-down versus bottom-up)

  • Perform several case studies using these techniques in domains with varying sizes starting with E-Learning

  • Look at alternatives to OWL-S for describing process semantics (e.g. BPEL)

EDOC 2004 - MDSW Workshop


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Questions? Web Service Technology

EDOC 2004 - MDSW Workshop


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References Web Service Technology

  • The OWL Services Coalition. Owl-s: Semantic markup for web-services. [Online] Available http://www.daml.org/services/owls/1.0/owl-s.html, December 2003.

  • Gerald C. Gannod, Sudhakiran V. Mudiam, and Timothy E. Lindquist. Automated Support for Service-Based Software Development and Integration. Journal of Software and Systems Special Issue on Automated Component-Based Software Engineering, 2004 (in press).

  • David Garlan, Robert T. Monroe, and David Wile. Acme: An Architecture Description Interchange Language. In Proceedings of CASCON’97, pages 169–183, Toronto, Ontario, November 1997.

EDOC 2004 - MDSW Workshop


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References Web Service Technology

  • Joaquin Miller and Jishnu Mukerji et al. MDA Guide Version 1.0.1. Technical Report omg/2003-06-01, Object Management Group, June 2003.

  • P. Clements and L. M. Northrop. Software Product Lines – Practices and Patterns. Addison-Wesley, 2002.

  • Edmund W. Clarke and Jeannette M. Wing. Formal Methods: State of the Art and Future Directions. Technical Report CMU-CS-96-178, Carnegie Mellon University, August 1996. Group report from the “Strategic Directions in Computing Research Formal Methods Working Group ACM Workshop”.

EDOC 2004 - MDSW Workshop


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References Web Service Technology

  • Gerald C. Gannod and Sushant Bhatia. Facilitating automated search for web services. In Proceedings of the 2004 IEEE International Conference on Web Services, July 2004.

  • K. Sycara, M. Paolucci, A. Ankolekar, and N. Srinivasan. Automated discovery, interaction and composition of semantic web services. Journal of Web Semantics, 1(1), 2003

EDOC 2004 - MDSW Workshop


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