Z:gnu-www-ja-gpl-2.0-faq--7a0e10-The GPL was designed for progr/en

The GPL was designed for programs; it contains lots of complex clauses that are crucial for programs, but that would be cumbersome and unnecessary for a book or manual. For instance, anyone publishing the book on paper would have to either include machine-readable &ldquo;source code&rdquo; of the book along with each printed copy, or provide a written offer to send the &ldquo;source code&rdquo; later.