"Mapping" or "thesaurus alignment" refers to the process of creating a correspondence table between two classifications. As part of the process, which can be assisted by software tools, an expert identifies corresponding concepts in the two classifications and records a relationship (mapping) between them.
The resulting "mapping" or "correspondence table" indicates for each concept in one classification the corresponding concept(s) in the other classification. To do so, it can use SKOS relationships, such as "same as", "broader", or "narrower".
The Commission also tested the mapping of skill national classifications to ESCO during the ESCO skills mapping pilot.