Nowadays, information and communication technologies (ICTs) and virtual training have increased the use of educational resources. This growth use has highlighted educational resource reuse and availability problems. Resource descriptions adapted to particular needs and the lack of metadata enrichment taking advantage of the benefits provided by the Semantic Web are some examples of these problems. The purpose of this paper is to expose an enhanced and interoperable set of metadata elements for describing OER (Open Educational Resources), which takes full advantage of the Openness and data enrichment. In this research, requirements such as data quality dimensions, Linked Data, and mapping into RDF (Resource Description Framework) Graph, have been taken into account to provide well-described, available, reusable and enriched OER, in addition, to display them as Linked Data. These features contribute to the educational field strengthen the processes of Opening, Availability, Reuse, and Linking OER. In a nutshell, these features are necessary to facilitate innovative educational settings. Finally, this improved OER description can be extrapolated to other countries, serving as a potential Opening and reuse guidelines to publish OER on both applications and LOD (Linked Open Data) Cloud.