@misc{RingelsteinStaab2010, author = {Christoph Ringelstein and Steffen Staab}, title = {PAPEL: Syntax and Semantics for Provenance-Aware Policy Definition}, institution = {Fachbereich 4}, series = {Arbeitsberichte, FB Informatik}, number = {2010,4}, type = {periodicalpart}, pages = {21}, year = {2010}, }