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. 45

Section 2.4.4.1. Data identification

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

2.4.4.1. Data identification

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The fundamental principle that underpins MIF is exactly as for CIF: every data item is represented by a unique data tag followed by its associated data value. These combinations are referred to as tag–value pairs or tuples. Data names must start with an underscore (i.e. underline) character and data values may be any type of string, ranging from a single character to many lines of text. Here are some simple examples of MIF data items:[Scheme scheme1]

The complete list of MIF core data items is given in Chapter 4.8[link] .








































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