Boudebza, SouadAzouaou, FaiçalBerkani, LamiaNouali, Omar2015-05-132015-05-132013http://dl.cerist.dz/handle/CERIST/748We address in this paper the need of improving knowledge reusability within online Communities of Practice of E-learning (CoPEs). Our approach is based on contextual semantic annotations. An ontological-based contextual semantic annotation model is presented. The model serves as the basis for implementing a context aware annotation system called “CoPEAnnot”. Ontological and rule-based context reasoning contribute to improving knowledge reuse by adapting CoPEAnnot’s search results, navigation and recommendation. The proposal has been experimented within a community of learners.community of practice of e-learninge-learningknowledge reusesemantic annotationConference paper