Z:gnu-www-ja-gpl-2.0-faq--2fa8db-Some programs copy parts of th/en

Some programs copy parts of themselves into the output for technical reasons&mdash;for example, Bison copies a standard parser program into its output file. In such cases, the copied text in the output is covered by the same license that covers it in the source code. Meanwhile, the part of the output which is derived from the program's input inherits the copyright status of the input.