Citation:
Cheney, James, Stephen Chong, Nate Foster, Margo Seltzer, and Stijn Vansummeren. 2009. “Provenance: a future history.” Proceedings of the 24th ACM SIGPLAN conference companion on Object oriented programming systems languages and applications, 957–964. ACM. Copy at http://www.tinyurl.com/y4eq7wtp