"open license to least open license"
May we reword
- These categories are arranged from most open license to least open license.
- These license categories are arranged from least to most restrictive.
and consider the following ordering:
PD CC-BY CC-BY-SA GFDL CC-BY-NC CC-BY-NC-SA
If we were using a "freedom" scale, CC-BY-SA and GNU FDL would come before CC-BY (as they protect the freedom of users of derived works).
I notice at least one CC-BY-ND (under "CC-BY-NC or CC-BY-SA")