Dictionary definition language DDL2

The relational dictionary definition language (DDL2) is a formalism employed for the recording of CIF data names and their definitions and properties within the mmCIF and related dictionaries.

See also the related DDLm dictionary definition language.

Current release

• Version 2.1.6 of 15 April 2005
  • HTML version
• Search for a data name

Archival versions

• Version 2.1.3 of 16 October 2000
  • HTML version
  • Formatted pdf version [Chapter 4.10 of International Tables for Crystallography Volume G: Definition and exchange of crystallographic data, First edition (2005)]

Updated 21 July 2005