Dating from 1978 when catalogues of the Central Library of the Commission of the European Communities (now the European Union) were computerised, ECLAS is a thesaurus created by the Central Library of the Commission of the European Communities for indexing the publications and documents acquired by the Central Library of the Commission. ECLAS was based on the Macrothesaurus of OECD and complemented by the ILO thesaurus. After creation of EUROVOC in 1984, convergence started in order to bring ECLAS in line with EUROVOC, but it was never complete. ECLAS contains nineteen areas of interest in a hierarchical tree structure consisting of four levels. ECLAS is fully available in English and in French.
The OP COMM ECLAS is maintained by the Publications Office of the European Union and disseminated on the EU Vocabularies website. It is a dormant asset; corrections can be published exceptionally if necessary.
