\input zb-basic \input zb-ioport \iteman{io-port 05993158} \itemau{Szilas, Nicolas; Boggini, Thomas; Axelrad, Monica; Petta, Paolo; Rank, Stefan} \itemti{Specification of an open architecture for interactive storytelling.} \itemso{Si, Mei (ed.) et al., Interactive storytelling. Fourth international conference on interactive digital storytelling, ICIDS 2011, Vancouver, Canada, November 28 -- December 1, 2011. Proceedings. Berlin: Springer (ISBN 978-3-642-25288-4/pbk). Lecture Notes in Computer Science 7069, 330-333 (2011).} \itemab Summary: This article introduces OPARIS, an OPen ARchitecture for Interactive Storytelling, which aims at facilitating and fostering the integration of various and heterogeneous Interactive Storytelling components. It is based on a modular decomposition of functionalities and a specification of the various messages that different modules exchange with each other. \itemrv{~} \itemcc{} \itemut{Interactive Digital Storytelling; Interactive Narrative; Architecture; Narrative Engine; Behaviour Engine; Animation Engine} \itemli{doi:10.1007/978-3-642-25289-1\_41} \end