Hello, I would like to package some additional catalogs for Skychart, but I have some questions regarding license. As you can see on skychart download page [1], each package has more than one catalog inside. All of these catalogs are known to be public domain, but there's no license file specified either in catalogs or on original websites of the catalogs [2] [3]. Moreover, original catalog data is reworked by skychart's developer to fit the main program, so the result only work in skychart. My question is: can additional catalogs subpackages be the case stated at https://fedoraproject.org/wiki/Packaging:LicensingGuidelines#Subpackage_L... where it's not necessary to include own license? Or should I contact all makers of the source data from wich these catalogs are built and ask them the licenses? Thank you Mattia [1] http://www.ap-i.net/skychart/en/download [2] http://ad.usno.navy.mil/wds/ [3] http://www.astro.ku.dk/~erik/Tycho-2/