The total number of European Registry of Materials Identifiers (or ERM identifiers for short) for registered materials is currently over 300. The European Registry of Materials dentifier is registered with FAIRSharing at fairsharing.org/bsg-s001384/. The registration of the identifier in identifiers.org is available at registry.identifiers.org/registry/erm (MIR:00000763). This also defined the 'erm' namespace for the compact identifier. Finally, the ERM identifier has also been added to the Chemical Information Ontology (CHEMINF) and is included in the eNanoMapper ontology , allowing encoding of the ERM identifiers in Resource Description Framework representations of nanosafety data and annotation of ERM identifiers in spreadsheets and ISA-Tab files .