Copy data partly or all ! What is the difference?

After creating/updating a new entry inside one table, it is possible to assumes Metadata from existing files. This is possible due to the "Copy Data - All" or "Copy Data - Partly" Button. But whats the difference? Which data will be copied?

Copy Partly: --------------- Title Flags Personal Pool Priority Informat Language Ressort SubRessort Program Broadcast BroadcastDate Author Editor Production Source Keywords Remark SendRights

Copy All --------------- Title Flags Personal Pool Priority Informat Language Ressort SubRessort Program Broadcast BroadcastDate Author Editor Production Source Keywords Remark SendRights GemaID Broadcastings FirstUseDate LastUseDate DeleteDate RecordDate Fading Ramp Donut Tag Presenter Speaker Project Category MusicFormat Type Intensity Mood Tempo Style Era Instrumentation Target Playtime Seasonal Weekday CartPriority EndCode Carrier Motive ForeignMotive Spotlength Customer Product ProductGroup ExtDevice GenericTitle SubTitle Composer Producer Owner Performer Mixer Album RecordPlace Correspondent Orderer Distribution Presentation FirstWords LastWords

Additionally, all to this eintry linked files will be copied, too.