Research On Service Extensions Description Model And Matching Algorithm For Information Management System

In modern society， the informatization level of the enterprise is raisingconstantly．A variety of information management systems are widely used in all walksof life．As the scale and business of the enterprise are keeping constantly expandin，thesystem developers often need to periodically extend system functions to meet theconstantly changing needs．The enterprise’s information management system is hopedto have the ability to expand as needed in real time．It must have good scalability andcan achieve new functions timely，precisely and flexibly．According to the above conditions，the system researchers start to focus onsearching a loosely coupled way to organize the system with services when a newinformation management system is in the design．This thesis has a rearch on thecriterions of services’ description，communication，registration and discovery，andthen presents a service-oriented way for information management system’s functionextension．The main work is as follows：This thesis analyses the architecture of the information management system andpresents an external service expansion module for Web service to extend systemfunctions．The overall framework for service discovery module has been designed，including of the service registry，service management module，service searching moduleand service matching module．With the overall framework is presented，this thesis analyzed the existing servicemodeling methodology for the service searching module of the service discoverymodule．In order to avoid the lack of binary relations caused by the traditional grammardescription，we not only choose the ontology language to describe the service，but alsoadd a description of the quality factor for the service model on the basis of semanticdescription．This description can provide a more comprehensive service information forthe next step．And then a three-tier service matching algorithm has been designed for the modelof extended service description． According to the classification of the serviceproperties， the service matching process is divided into three stages of thenon-functional attributes matching，IOPE matching and QoS matching．Combining withthe improved hierarchical matching algorithm and semantic distance similarityalgorithm，a hybrid matching algorithm has been designed for the matching process． Finally，the interface for service searching module has been designed for gettinginput from the user’s query request parameters，and then the matching process has beencomplished for the service discovery function．The model’s efficiency and feasibilityare verified by an example of searching a weather service for the syetem．...