How is this related to the Cambridge Crystallographic Data Centre (CCDC) and the CSD?
It isn’t. CCDC are a not-for-profit organisation which for many years has aggregated crystal structures from the literature and applied a variety of cleaning methods to the data. It has records going back about 50 years and is available by subscription only. At one stage many journals required that a copy of the crystallographic data associated with a publication were deposited directly with CCDC (often by the journal editors) and some journals still do this. However, with the advent of CIF and ePublishing, several journals, most notably those of IUCr, run online checking facilities and directly publish the CIF as supplemental data. It is this Open Data publication that makes CrystalEye possible. CCDC produce their own version of the CIF file (for subscribers or one-off queries) which includes a unique 6- or 8-character REFCOD. CrystalEye does not use this CIF, or the REFCOD or any other data or software from CCDC.
