Data Definition Language (DDL) Reference Manual

Data Definition Language (DDL) Reference Manual—529431-004
D-1
D Dictionary Database Structure
A dictionary is itself a DDL database consisting of 14 files. The DDL compiler supplies
the names of the dictionary database files; these names must not be changed.
Topics in this appendix:
•
Dictionary Components on page D-1
•
Dictionary Files on page D-3
•
Definition and Record Storage in the Dictionary on page D-64
Dictionary Components
A dictionary has three basic components:
•
Objects on page D-1
•
Elements on page D-2
•
Text Items on page D-2
Objects
An object can be:
•
A single element:
°
Constant
°
Single-field definition
°
SPI token type
°
SPI token code
•
A group of elements:
°
Record
°
Group definition
°
SPI token map
The DDL compiler can add these objects to and delete them from a dictionary, as well
as perform other operations on them.
Note. Information in this appendix is not guaranteed to remain the same or to change in
compatible ways from RVU to RVU.