An Hybrid, QoS-Aware Discovery of Semantic Web Services Using Constraint Programming

  • Authors:

  • José María García;David Ruiz;Antonio Ruiz-Cortés;Octavio Martín-Díaz;Manuel Resinas

  • Affiliations:

  • Universidad de Sevilla, Escuela Técnica Superior de Ingeniería Informática, Av. Reina Mercedes s/n, 41012 Sevilla, España;Universidad de Sevilla, Escuela Técnica Superior de Ingeniería Informática, Av. Reina Mercedes s/n, 41012 Sevilla, España;Universidad de Sevilla, Escuela Técnica Superior de Ingeniería Informática, Av. Reina Mercedes s/n, 41012 Sevilla, España;Universidad de Sevilla, Escuela Técnica Superior de Ingeniería Informática, Av. Reina Mercedes s/n, 41012 Sevilla, España;Universidad de Sevilla, Escuela Técnica Superior de Ingeniería Informática, Av. Reina Mercedes s/n, 41012 Sevilla, España

  • Venue:
  • ICSOC '07 Proceedings of the 5th international conference on Service-Oriented Computing
  • Year:
  • 2007

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Abstract

Most Semantic Web Services discovery approaches are not well suited when using complex relational, arithmetic and logical expressions, because they are usually based on Description Logics. Moreover, these kind of expressions usually appear when discovery is performed including Quality-of-Service conditions. In this work, we present an hybrid discovery process for Semantic Web Services that takes care of QoSconditions. Our approach splits discovery into stages, using different engines in each one, depending on its search nature. This architecture is extensible and loosely coupled, allowing the addition of discovery engines at will. In order to perform QoS-aware discovery, we propose a stage that uses Constraint Programming, that allows to use complex QoSconditions within discovery queries. Furthermore, it is possible to obtain the optimal offer that fulfills a given demand using this approach.