The item_units category holds a code which identifies the system of units in which a data item is expressed. The data item _item_units.code is a child of the item, _item_units_list.code. Unit definitions are actually made in the item_units_list parent category. The item, _item_units.code, provides an indirect reference into the list of data type definitions in category item_units_list. This indirect reference is provided as a convenience to avoid the redeclaration of the full data type specification for each data item. The key item for this category is _item_units.name which is defined in the parent category, item. Only one type of units may be specified for a data item.
The DDL for the item_units category is given in the following section.
save_ITEM_UNITS
_category.description
;
Specifies the physical units in which data items are expressed.
;
_category.id item_units
_category.mandatory_code no
_category_key.name '_item_units.name'
loop_
_category_group.id
'ddl_group'
'item_group'
save_