This repository records the development of the IUCr twinning dictionary. As of Feb 14th, 2014, datanames from this dictionary may be used in data files and programs without danger that they will change in the future.
No further development is planned for this repository as the DDL1 version has now been replaced by the DDLm version (see the Twinning_Dictionary repository). Please refer to that repository for any further changes.
Due to changes in line termination between operating systems, differences between versions are best displayed by ignoring whitespace differences.