Before you start it is good to repeat some of the conclusions that were obtained from
the first chapter (see Figure 5.1):
- An attribute table is linked to a map through its domain.
- An attribute table can only be linked to maps with a class domain, an ID domain or
a Bool domain.
- An attribute table may contain several columns. Each of these columns can have a
class, ID or value domain (or other special domains, such as color, string, bool etc.)