the ccdc uses two different codes to distinguish between the deposited dataset and the curated csd entry. for example, one specific ‘"csd communication"’ of an organic molecule was deposited with the ccdc and assigned the deposition number 'ccdc-991327.' this allows free public access to the data as deposited. from the deposited data, selected information is extracted to prepare the validated and curated csd entry which was assigned the refcode 'mitgut'. as a part of the curation process, ccdc also applies an algorithm, decifer, to help the editors assign chemistry to structures when those representations (e.g. bond types and charge assignments etc.) are missing from the original cif files submitted. the validated and curated entry is included in the csd system and webcsd distributions, with availability restricted to those making appropriate contributions.