A Synchronized Hypermedia Document Model Based On Xml Research And Implementation

Since WWW developed, To control synchronized hypermedia information is always a problem, and a research hotspot too. In order to resolve the hypermedia representation synchronized control, real-time transmission and overtime hyperlink etc problem on the network, In this paper adopt the hypertext technology and multimedia technology combine into hypermedia technology, and apply the new technic XML to describe synchronized hypermedia document model,It settled the media heterogeneity format unification description and open of document ; It implemented the heterogeneity system interactive^ transplantable and resource share and resuse; It apply synchronized multimedia integration language establish its synchronized hypermedia document of model, and settled the hypermedia document real-time interactive, resuse and retrive.lt implemented to satisfy the hypermedia in the synchronized control multi-communication mode compatible, document structure open, real-time interactive etc performance.Firstly, we brief introduced hypermedia technology and the synchronized mechanism in this paper, we expatiated respect hypermedia basic factor, particular described hypermedia document model structure, formalization defined hypermedia document model, analyzed hypermedia document structure characteristic; Secondly, we summarized hypermedia synchronized mechanism, particularly analyzed XML thchnique and its subset SMIL technique, We put forward XML-based synchronized hypermedia document model and with the UML technique erected the XML courseware document model, We described synchronized hypermedia courseware document relation of time synchronization and space layout; Finally, we analyzed the courseware document model srucuture and modelingmethod, designed and implemented with the courseware document model for the core into synchronized hypermedia real-time education system prototype, We analyzed the system communiction structure and logic structure, described the system base on the XML schema object model, Tested the system, the result indicated the system more adaptation than the tradition elearning system, preferably settled the hypermedia document real-time transmission bandwidth and synchronized control problem, reached anticipative purpose.We studied and implemented synchronized hypermedia document model in the paper, It is XML-based data model and modeling method, Constructed the synchronized hypermedia document model have algorithm briefnessN produce facility , tend to implementation , little network transmit superfluity overhead and preferably QoS quality, it has quite vastitude application foreground. But it could not design the dynamic modeling for the courseware document and it could take out application for the real-time update and enrich the courseware resource library now. It will be more research work from now on.