Default settings and permission settings on package

Question

How do the default and permission settings work on package?

Answer

The permission settings on package are shown in the table below:

Parent	Default	Group	Personal	Result
no	-	-	-	no
no	no	-	-	no
no	yes	-	-	yes
no	x	-	no	no
no	x	-	yes	yes
no	x	no	-	no
no	x	yes	-	yes
no	x	no	no	no
no	x	no	yes	yes
no	x	yes	no (not possible)**	yes
no	x	yes	yes	yes
yes	-	-	-	yes
yes	no	-	-	no
yes	yes	-	-	yes
yes	x	-	no	no
yes	x	-	yes	yes
yes	x	no	-	no
yes	x	yes	-	yes
yes	x	no	no	no
yes	x	no	ano (not possible)**	no
yes	x	yes	no	no
yes	x	yes	yes	yes

* If you set permissions on a group, the settings are automatically checked on the user who is a member of the group. 
- not specified    
x value does not matter    

 
If there is no default setting i.e. the setting is taken from the parent root package, the repository is not visible by default, or reading is not allowed.