This is an archive copy of the IUCr web site dating from 2008. For current content please visit https://www.iucr.org.
Dictionary Definition Language
The Dictionary Definition Language (DDL) is a formalism employed
for the recording of CIF data names and their definitions and
properties within CIF
dictionaries.
Current versions
DDL1
(as used in the CIF core and related dictionaries)
DDL2
(as used in the macromolecular CIF and related dictionaries)
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