Research on Sharing and Aggregating of Web Learning Materials Based on GRDDL and Topic-Oriented Crawler

Reusability, sharability, and interoperability are the main research subjects of modern learning systems. A lot of e-learning standards, such as LOM, IMS, SCORM, AICC etc., have provided us many flexible reference solutions for achieving these goals. In order to construct a more flexible framework to share and reuse Web learning materials between CBT vendors, LMSs, and learners, this paper defined a uniformed structure -learning asset (LA)-to integrate material and its metadata in a single media, proposed a two-stage metadata gleaning mechanism based on GRDDL and topic-oriented crawler to provide a flexible and high-performance searching of LA-specified metadata, figured a framework for sharing, reusing and aggregating learning content with semantic reasoning.