[Fedora-legal-list] license of catalog subpackages

[Mattia Verga]

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_Licensing 
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/