RCBA: An Efficient Annotation Tool for Community E-Learning

The topic of webpage content annotation has been an important research area in the field of human computer interaction. Annotation tools enable "value-adding" info to digital resources, by adding additional data in the form of provenances, understandings, references, comments and other types of remarks. They facilitate learners\´ and reviewers\´ understanding and remembering of information accessible over the Web, and make the collaborative learning easier. This paper describes an efficient annotation tool RCBA (Role Control Based Annotator), that we have developed which uses RBAC (Role Based Access Control) theory to identify and authenticate users and restrict their access to annotations stored on the database server, and enhance the knowledge sharing and reuse in communities\´ E-learning.