01 Feb 07 A Peer-To-Peer (P2P) Based Semantic Agreement Approach For Spatial Information Interoperability
DISSERTATION (download di sini)
Submitted to the Doctoral Program of Information Technology
Gunadarma University
as a partial fulfillment of the requirements for the degree of Doctor of Information Technology
I WAYAN SIMRI WICAKSANA
DOCTORAL PROGRAM OF INFORMATION TECHNOLOGY GUNADARMA UNIVERSITY January, 2006
ABSTRACT
Recently, research on information systems has increasingly focused on how to
effectively manage and share data in heterogeneous distributed environments. Various data sources can be accessed online in the web, including web pages, semi-structured documents (XML, RDF, etc.) and spatially referenced data.
The need for sharing data stems from (i) the explosive growth of the web and the ability to interconnect a growing number of information sources, (ii) the increasing availability of
autonomous data sets, and (iii) rising acquisition costs of complex non traditional data. For example, geographic information systems are more and more used in location based applications and decision support systems that rely on combining data from multiple
data sources. Spatial data are very costly to collect and are often independently created by different institutions.
This thesis focuses on interoperability of spatial information based on P2P based data management and semantic mediation. The approach based on a P2P for semantic interoperability of information sources that aims to combine the advantages of
semantic mediation and peer-to-peer systems is proposed. It is based on a hybrid P2P
architecture consisting of three types of peers. The super peer contains a reference
ontology which provides a taxonomy description of the common domain. The provider peer contains export schema which represent local data, The request peer submits queries to provider peers.
The details of matching peer content and describe the phases of query processing based on
the peer agreement approach is presented and the underlying architecture at chapter 4.
And the development of a prototype to evaluate the proposed method is described at chapter 5. The prototype uses OWL to describe reference and local ontology.
