In this section, the DDL categories that describe the characteristics
of a dictionaries and data blocks are presented. In this context,
a dictionary is defined as a group of related definitions within a STAR
data block. Figure 
illustrates the schema for these categories.
Figure:
The schema of DDL definitions that describe the characteristics
of dictionaries and data blocks.
In this figure, boxes surround data items which belong to the
same category. Category identifiers are given in large font
and item names are given in small font. Parent-child relationships
are specified by lines connecting data items with the arrow pointing
at the parent item. Key items within a category are identified
by a preceding black dot.