Metamodelo para vinculación de recursos educativos abiertos mediante especificaciones LOD y basado en principios de confianza

Abstract

At present, it is shown high availability of educational resources on the Web; a large majority of those are posted with copyright. It allows that the siting, access, query, and retrieval of those which are open and tailored to the users’ requirements, will come under an increasing need. This need is to be found when these resources, along with the virtual learning environments, become key elements and strategies at the moment of addressing issues such as the one experienced due to the COVID-19 pandemic. Currently, in the knowledge domain of Open Educational Resources (OER) and the querying and retrieving processes, different challenges -associated with scarce description of their features, special needs of those organizations that post, among others- are presented. Besides, the OER descriptions unveil diverse data quality issues, their data models are not openly available, and finally, those descriptions do not offer semantic enrichment that contributes to providing more context to the users in the consulting and retrieving processes of the resources, situations that have restricted availability and reuse of OER. Arisen from the problems mentioned previously, the need to provide an improved and enriched description of OER that addresses quality data elements from the abstraction and setting stages of the features, as first steps of open and enhanced data life cycle was identified.

Taking into account the aforementioned need and the structure of various theoretical components that render restrictions and standards for its implementation, the present thesis aims at designing a metamodel that articulates an OER description with improvements through the execution of data quality dimensions, along with the semantic enhancement endowed by linked data. This metamodel allows to build a model to describe Open Educational Resources which is mapped in two formats: Dublin Core, as the simplest and most widely used metadata schema; and RDF, as standard of data interchange to develop the interconnected data process. This improved model, to describe OER and their mapping, contribute to enabling the availability and reuse of OER, also, provides a wider set of characteristics that permits and facilitates searching and retrieving processes of resources from users. Moreover, it allows a greater interoperability level with other models when having a larger number of features, as criteria upgrading in searching and retrieving processes of educational resources for other applications.