Lun space-reserve

Hi everyone!
When you type the command: "lun show -instance" you have two fields: space-reserve and space-reserve-honored. When I read about them in NetApp docs the description was confusing. In short it implied that both those settings, if set to false or disabled, means that the lun is thinly provisioned. Does anybody know the real difference between them and which one really means that a lun will be thinly provisioned?
Thanks in advance...