a=) context between purposes
b) context between data collection
c)
a) burdn of proof of controller (beweislast des verantwortlichen
b) requirements on written consent
c) right to withdraw
d) prohibition of coupling (Kopplungsverbot)
2.
a) explicit consent
b) employment and social security law
c) protection vital interest
d) no profit intention
e) manifestly public data
f) enforcement of claims
g) substantial public interest
e) health care
g) public interest in the area of public health
h) archiving , research or statistical purpose