The idea of providing learners with an „e-portfolio“ serving as an individual learning room is rightfully considered a significant step towards the realization of the vision of lifelong learning. According to the authors, two aspects, which are usually disregarded when it comes to dealing with technology, presentation of content and software functionalities, need to be taken into consideration. These aspects are the possibility of referencing online information and its reliable availability. This article is intended to present a concept for the definition of guarantees of existence (GOEs).
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