[wilhelm]

Here's a superficial explaination:

http://en.wikipedia.org/wiki/Life_imprisonment_in_Norway

The punishment can only last 21 years. If someone is kept in preventive detention the only puropose is to protect other citizens. The best comparision would be forced treatment of the criminally insane. Once they're deemed fit to return to society, they are free to go.

[smsm42]

So it is basically the same as a life sentence, but with possibility of parole after 10 years with yearly parole hearings. I wonder what is the actual terms served (including those dying in prison) for crimes like aggravated murder, terrorism, etc.