Identifiers within conceptual models and standards

Identifiers are numeric or alphanumeric strings of characters permanently and uniquely associated with a resource to ensure stable access to it and its metadata. They play a fundamental role in the semantic web as they guarantee interoperability between different systems. Since their emergence, libraries and other institutions have been aware of their importance in data quality control processes, for the realization of authority control and universal bibliographic control, and have dedicated specific chapters for their registration within conceptual models, cataloguing standards and have provided specific fields in cataloguing formats.