Geoscience Reference
In-Depth Information
Figure 10:
definitions and constraints on data included in the database
The third section (
Figure 11
) lists, without distinction, all real world
entities which are represented in a given table with the same attribute
values. For example, watercourses with field '
artificial=true
' may represent
either channels, reaches and watercourses ('
canal
', '
bief
' and '
cours d'eau
'
in French), without any possibility to distinguish between them. This is a
way to explain the granularity of attributes describing the nature of objects,
which may be of importance for the user.
