Urban Versioning System v1.0.

What lessons can architecture learn from software development, and more specifically, from the Free, Libre, and Open Source Software (FLOSS) movement? Written in the form of a quasi-license, "Urban Versioning System 1.0" is a pamphlet by Matthew Fuller and Usman Haque, published by the Architectural League of New York as part of the Situated Technologies Pamphlet Series edited by Omar Khan, Trebor Scholz and Mark Shepard. The document posits seven constraints that, if followed, will contribute to an open source urbanism that radically challenges the conventional ways in which cities are constructed