INTERNATIONAL TABLES

for CRYSTALLOGRAPHY

Volume G

Definition and Exchange of Crystallographic Data

4.10. DDL2 dictionary

J. D. Westbrook and S. R. Hall

Abstract

This chapter presents the contents of the dictionary that defines the terms of the dictionary definition language (DDL2) used in the mmCIF family of CIF applications.

The data names defined in the DDL2 dictionary are used to describe the attributes of data definitions.

Version 2.1.3 of the DDL2 dictionary contains definitions for 91 data items grouped in 34 categories.

References

IEEE (1991). IEEE Standard for Information Technology - Portable Operating System Interface (POSIX) - Part 2: Shell and utilities, Vol. 1, IEEE Standard 1003.2-1992. New York: The Institute of Electrical and Electronic Engineers, Inc. See also http://www.opengroup.org/onlinepubs/009695399/.