In the United States, the underlying source code, and the game's artistic elements, including art, music, and dialog, can be protected by copyright law. However, gameplay elements of a video game are generally ineligible for copyright; gameplay concepts fall into the idea–expression distinction that had been codified in the Copyright Act of 1976, in that copyright cannot be used to protect ideas, but only the expression of those ideas. The United States Copyright Office specifically notes: "Copyright does not protect the idea for a game, its name or title, or the method or methods for playing it. Nor does copyright protect any idea, system, method, device, or trademark material involved in developing, merchandising, or playing a game. Once a game has been made public, nothing in the copyright law prevents others from developing another game based on similar principles." Courts also consider "scènes à faire" (French for "scenes that must be done") for a particular genre as uncopyrightable; games involving vampires, for example, would be expected to have elements of the vampire drinking blood and driving a stake through the vampire's heart to kill him. It is generally recognized in the video game industry that borrowing mechanics from other games is common practice and often a boon for creating new games, and their widespread use would make them ineligible for legal copyright or patent protection.