Distributed Search in Semantic Web Service Discovery

Computer Science;web services;service discovery;semantic web;ontologies;distributed search

Ziembicki, Joanna

University of Waterloo

关键词: Computer Science;    web services;    service discovery;    semantic web;    ontologies;    distributed search;   

Others  :  https://uwspace.uwaterloo.ca/bitstream/10012/1103/1/jiziembi2006.pdf

瑞士|英语

来源: UWSPACE Waterloo Institutional Repository

【 摘 要 】

This thesis presents a framework for semantic Web Service discovery using descriptive (non-functional) service characteristics in a large-scale, multi-domain setting.The framework uses Web Ontology Language for Services (OWL-S) to design a template for describing non-functional service parameters in a way that facilitates service discovery, and presents a layered scheme for organizing ontologies used in service description.This service description scheme serves as a core for desigining the four main functions of a service directory: a template-based user interface, semantic query expansion algorithms, a two-level indexing scheme that combines Bloom filters with a Distributed Hash Table, and a distributed approach for storing service description.The service directory is, in turn, implemented as an extension of the Open Service Discovery Architecture.

The search algorithms presented in this thesis are designed to maximize precision and completeness of service discovery, while the distributed design of the directory allows individual administrative domains to retain a high degree of independence and maintain access control to information about their services.