The census data is primarily structured on the basis of residence. This means that by opening an apartment or house one can see the associated residents and how they are related.
These relations are based in the primary provider of the residence, usually the role "father". All other residents are then listed by their association to this person, typically "daughter", "wife" or "brother".
This also applies if a person is opened directly; related people will list their family status in accordance to the primary provider of their household rather than the person you are currently viewing.