The content standardization module, i.e. the semantic aspects, takes into consideration the basic vocabularies and standard ontologies developed and made available by the main standardization bodies in the field of Earth Sciences and geosciences. In particular, it provides an overview of the resources made available by the European Commission for INSPIRE, by the IUGS CGI for earth sciences, as well as those developed by other international communities such as the W3C and RDA. The semantic standardization module also illustrates the principles and procedures relating to the creation of Project vocabulary for the creation of specific vocabularies / ontologies for a project that are complementary to the semantic harmonization process of geological data.