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

International Tables for Crystallography (2026). Vol. G. Early view chapter
https://doi.org/10.1107/97809553602060001023

Chapter 4.14 DDL2 dictionary

John D. Westbrooka and Sydney R. Hallb

aProtein 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, USA, and bSchool of Molecular Sciences, The University of Western Australia (M310), 35 Stirling Highway, 6009 Perth, Australia.

This is version 2.3.3 of the dictionary definition language (DDL2). It provides a machine-readable description of the attributes of data items in the mmCIF and related dictionaries. This version of DDL is described in Chapter 2.4.

Keywords: Crystallographic Information Framework; CIF dictionaries; dictionary definition language; relational DDL; DDL2; DDL2 dictionary; data attributes; data names; data categories; methods.

This chapter is in preparation








































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