Kudos for compensation to the downvotes I received. I don't know what happened to the "ask and learn" culture. I am not a native English speaker, and the term

Kudos for compensation to the downvotes I received. I don't know what happened to the "ask and learn" culture. I am not a native English speaker, and the term public domain was not self-explanatory (rather, it explained itself in the wrong way). In Hungarian, public domain means közkincs, which is roughly equivalent to "treasure of the public". So the question seemed reasonable to ask.