{'fraction_non_alphanumeric': 0.02051983584131327, 'fraction_numerical': 0.0027359781121751026, 'mean_word_length': 5.203389830508475, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Using Metadata Standards Represented in OWL for Retrieving LOs ’ Content

There is a great interest on the reuse of learning materials. However, nowadays, they are structured as multimedia files and, therefore, retrieving a specific material means retrieving the whole file, even though it could be desirable to access and use only parts of these materials. So, this paper proposes an ontology based on the metadata standards LOM and MPEG-7 for LOs’ content description, in order to retrieve specific parts of content embedded in LOs. Using LOM and MPEG-7 allows describing educational and multimedia characteristics while an ontology allows retrieving through graph navigation as well as the exploration of inferred relationships.