This database was entirely built in AGORHA.  Its fundamental structural principle is the interconnection and the dynamic cross-references between notices. This structure is based on precise indexing, which has made it possible to establish several thematic indexes.

The geographical and thematic indexing corresponds to French based word-indexation language RAMEAU of the Bibliothèque nationale de France, which does not offer English translations. We thus offer equivalence tables for non-French speaking users.