International
Tables for
Crystallography
Volume G
Definition and exchange of crystallographic data
Edited by S. R. Hall and B. McMahon

© International Union of Crystallography 2006
International Tables for Crystallography (2006). Vol. G. ch. 2.4, p. 46

Section 2.4.4.4. Data blocks

F. H. Allen,a* J. M. Barnard,b A. P. F. Cookb and S. R. Hallc

a Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge, CB2 1EZ, England,bBCI Ltd, 46 Uppergate Road, Stannington, Sheffield S6 6BX, England, and cSchool of Biomedical and Chemical Sciences, University of Western Australia, Crawley, Perth, WA 6009, Australia
Correspondence e-mail:  allen@ccdc.cam.ac.uk

2.4.4.4. Data blocks

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A data block is a sequence of unique data items or save frames. It is opened with a data_blockcode statement and closed by another data-block statement or a global_ statement (see below). The blockcode string identifies the block within the file. Examples of data blocks are shown in Figs. 2.4.4.2[link], 2.4.4.3[link] and 2.4.6.1[link]. Each data block in a file must have a unique blockcode.








































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