“…In presentation environments, the concept of unity in events is slightly different (e.g., an event must present only one topic and be constrained to a particular context), but it refers to the same characteristics nonetheless. In the majority of storytelling applications, events are represented as plain text (Figa and Tarau 2003;Silva, Guilherme, and Paiva 2003;Sumi and Tanaka 2005), scripted individual character actions (Gebhard, Kipp, Klesen, and Rist 2003), story world states Laird 2003, 2004;Szilas 2003), or multimedia content Rober, Huber, Hartmann, Feustel, and Masuch 2006). In ISRST, we support multimedia content in the form of images, audio, and video distributed over the web.…”