Abstract
The efficiency of the learning experience in a learning system is highly related to the capability of the system to offer learning resources in concordance with learner's needs and preferences. In the context of the semantic learning systems, the description of the learning objects and learners is realized using ontologies. In this paper we present a learner ontology used in the context of a semantic learning system. We study and conceptualize some of the learning-related dimensions of a learner, which can be used in a semantic learning system in order to provide the learner with an efficient learning experience. The learner ontology is constructed having in mind relations that a learner have with other objects that participate at the learning experience.