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

International Tables for Crystallography (2006). Vol. G. ch. 2.6, p. 67

Section 2.6.6.1.10. ITEM_RANGE

J. D. Westbrook,a* H. M. Bermana and S. R. Hallb

a Protein Data Bank, Research Collaboratory for Structural Bioinformatics, Rutgers, The State University of New Jersey, Department of Chemistry and Chemical Biology, 610 Taylor Road, Piscataway, NJ 08854-8087, USA, and bSchool of Biomedical and Chemical Sciences, University of Western Australia, Crawley, Perth, WA 6009, Australia
Correspondence e-mail:  jwest@rcsb.rutgers.edu

2.6.6.1.10. ITEM_RANGE

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The ITEM_RANGE category defines a restricted range of permissible values for a data item. The restrictions are specified as one or more sets of the items _item_range.minimum and _item_range.maximum. These items give the lower and upper bounds for a permissible range. To specify that an item value may be equal to the upper or lower bound or a range, the minimum and maximum values of the range are equated. The special STAR value indicating that a data value is not appropriate (denoted by a period, ` .') can be used to avoid expressing an upper or lower bound value. When limits are applied to character data, comparisons are made following the collating sequence of the character set. When limits are applied to abstract data types, methods must be provided to define any comparison operations that must be performed to check the boundary conditions.








































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