Chapter 4.9 DDL1 dictionary

Definition and exchange of crystallographic data

First Online Edition (2006)

Part 4. Data dictionaries

  1. S. R. Hall

Published Online: 1 JAN 2006

DOI: 10.1107/97809553602060000749

International Tables for Crystallography

International Tables for Crystallography

How to Cite

Hall, S. R. 2006. DDL1 dictionary. International Tables for Crystallography. G:4:4.9:471–472.

Author Information

  1. School of Biomedical and Chemical Sciences, University of Western Australia, Crawley, Perth, WA 6009, Australia

Publication History

  1. Published Online: 1 JAN 2006


This is version 1.4.1 of the dictionary definition language (DDL1). It provides a machine-readable description of the attributes of data items in the core CIF and related dictionaries. This version of DDL is described in Chapter 2.5.


  • crystallography;
  • CIF;
  • CIF dictionaries;
  • Crystallographic Information File;
  • dictionary definition language;
  • data names;
  • data categories;
  • DDL1