 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| • |
Components
include Entity Description,
|
|
|
Study
Group Description, Variable
|
|
|
Description
|
|
|
|
– |
We
do not currently include DDI’s data files
|
|
|
component
or the elements in the variable
|
|
|
description
related to data cubes
|
|
|
| • |
Entities
can be embedded in other entities
|
|
|
– |
An
entity is any statistical object
|
|
|
| • |
Study Group provides ability to relate
|
|
|
survey
programs and instances
|
|