In order to re-create relationships between
different records, you should use the unique
identifier from the original application and
map it to the ID
column in OpenERP. When you
import an other record that links to the first
one, use XXX/ID
to the original unique identifier.
The ID
will also be used to update the original
import if you need to re-import modified data
later, it's thus good practice to specify it
whenever possible