A CIF dictionary for raw image data

The imgCIF dictionary provides data names for description of raw image data, usually from diffraction experiments. Currently the main development of imgCIF takes place in the cbflib repository.

This repository holds a DDLm version of the imgCIF dictionary found in the main branch of that repository in this repository's main branch. This DDLm version may be used as a data name reference.

Deriving the DDLm version from the DDL2 version

The DDLm version was automatically obtained from the DDL2 version by running the command:

julia ddl_to_ddl.jl -c cif_core.dic -i -k _diffrn.id -t "Identifier for data collection." -o cif_img.dic cif_img_1.8.6.dic ddl2

using the ddl_to_ddl.jl tool and associated translation dictionaries from the https://github.com/jamesrhester/ddl_to_ddl repository and the cif_core.dic found in the COMCIFS cif_core repository.

In particular, the translation options above perform the following:

1. All DDLm attributes are "calculated" from DDL2 attributes according to translation dictionaries included in the ddl_to_ddl repository.

2. Additional non-canonical data attributes (prefixed with ddl2) are included in the translated DDLm dictionary to preserve information not captured by DDLm attributes. For details see the ddl_to_ddl tool.

3. Any common categories defined to be of class Set in cif_core.dic are restated to be Set categories in the translated dictionary

4. All categories containing the string diffrn in their name have a child data name of _diffrn.id added to their key data names in keeping with the implicit DDL2 convention.

5. The cif_core dictionary is imported by the dictionary to show that these definitions build on those found in cif_core.

Finally, the result is pretty-printed and manual layout adjustments performed to meet the style guide requirements.