Open Educational Resources (OER) are important for the expansion of ubiquitous learning. Open licensing of learning components is a precondition for supporting anytime, anywhere learning, whether the lessons are arranged as text, multimedia, videos, applications, games or in other electronic formats. The obstacles presented by proprietary materials impede ubiquitous sharing of knowledge with the use of technological protection measures such as DRM (digital rights management), prohibitive

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... ng, and restrictions on format shifting, localization, content sharing and other activities considered essential in ubiquitous learning.