Category groups

The following category groups are defined in this dictionary:

ddl_group: Component categories of the macromolecular DDL.
datablock_group: Categories that describe the characteristics of data blocks.
category_group: Categories that describe the characteristics of categories.
sub_category_group: Categories that describe the characteristics of subcategories.
item_group: Categories that describe the characteristics of data items.
dictionary_group: Categories that describe the dictionary.
compliance_group: Categories that are retained specifically for compliance with older versions of the DDL.