ISO/IEC 19788 Information technology – Learning, education and training – Metadata for learning resources is a multi-part standard prepared by subcommittee SC 36 of the joint technical committee ISO/IEC JTC 1, Information Technology for Learning, Education and Training. It is recognized as a horizontal standard dealing with a subject relevant to a number of committees or sectors and of crucial importance to ensure the coherence of the corpus of standardization deliverables. It provides specifications of generic data elements attributes and rules used to define the semantic meaning of any type of information in a predictable way with the aim of supporting multilingual and cultural adaptability requirements from a global perspective. Original purpose The ISO 15836 Dublin Core (DC) and the IEEE 1484.12.1-2002 Learning Object Metadata (LOM) are widely used to describe learning resources. However, interoperability among DC data sets is challenging, as best practices are only recommended. Instead of using ISO 8601, a DC Date element can be written in plain language and not processed by queries. Ambiguous definitions pose another challenge as data elements and vocabulary values can be interpreted in a subjective way. For example, the DC Date can be linked to resource creation time, update or publication. In the LOM, the Cost element can only have a “yes” or “no” values. This is also true for LOM records as they are based on a wide variety of Application profiles. The ISO/IEC 19788 standard is intended to provide optimal compatibility with both DC and the LOM and supports multilingual and cultural adaptability requirements from a global perspective. The standard has two primary purposes: facilitate the identification and specification of the metadata elements required to describe a learning resource by providing metadata elements and their attributes support search, discovery, acquisition, evaluation, and use of learning resources by learners, instructors or automated software processes. Data Element Specification (DES) To avoid ambiguity and provide interoperability, metadata learning resources (MLR) data elements are documented using attributes. Resource Description Framework Approach The Resource Description Framework is a method for conceptual description of metadata information. Assertions about a learning resource are made using triples (subject, predicate, object) where subject represents the learning resource, predicate is a property identifier and object is the property value. In a MLR triple, the subject is always the literal of an identifier of the learning resource, such as a URI or ISBN. The predicate is also a literal, the