The root 'unit' of copyright is an 'expression'. When you create an expression of something, you get the rights attached to it by copyright, like the right to distribute that expression, the right to make derivative works, etc.
The root 'unit' of copyright is an 'expression'. When you create an expression of something, you get the rights attached to it by copyright, like the right to distribute that expression, the right to make derivative works, etc.