the interactive documentary, still barely emergent, has attracted both enthusiasm and analysis. Despite the cautions of Lev Manovich against the inexactitude of the term "interactive" (since all art at some level is interactive), the term "interactive" has come to be generally used to designate multimedia, mostly screen-based storytelling. Sessions at film festivals and even entire conferences on interactive documentary are now standard. At the standard-setting South by Southwest (SXSW) event in Austin, Texas, a strand of interactive documentary that finds overlapping audiences between SXSW's Interactive and Film conferences has become a place where even standing room is highly prized. Tribeca, Sheffield, and IDFA (International Film Festival at Amsterdam) film festivals have interactive strands/conferences. Events such as "Future of StoryTelling," "TransVergence," and "Power to the Pixel" are among the many venues where professionals exchange stories and hints about making these new works. Entities as diverse as the US Army (Myers),1 the Museum of Modern Art in New York, and US public television stations ("Localore") 2 are developing interactive projects (Stogner).TaxonomiesAt the same time, early academic work is being done on taxonomies for interactive documentary (Nash). Indeed, the Open Documentary Lab at MIT, founded in 2012, features a research forum in which this is one of the issues. One way to organize the categories is by technical approaches: Web documentary, transmedia, and interactive documentary (O'Flynn). In this taxonomy, Web documentaries, such as the series Black Folk Don't (blackfolkdont.com, since 2012), use the Web as a distribution platform for typically static material, which the viewer can select from. Transmedia projects are constructed across various platforms, as in the Exit Zero Project (exitzeroproject.org, 2013), which occurs across a book, a film, and a Web database, and Reinvention Stories (reinventionstories.org, 2013), featuring short films, a tour with audio and video stops, and a site for contributed knowledge. (Transmedia projects may also involve performances and geo-located games such as scavenger hunts.) Although some of these applications may be interactive, some transmedia projects allow only a selection of material rather than contributions. Finally, interactive documentaries have user participation built into their action and typically feature databases as integral to their actions. Just a Reflektor (justareflektor. com, 2014) is one example.Other conceptualizations are also being tried out. Sandra Gaudenzi has created taxonomies rooted in experience, describing interactive documentaries in terms of how viewers are positioned (e.g., conversational, experiential) and as semi-closed (user can choose what material to browse), semi-open (user can add material but not change structure), or open (system adapts to all inputs). These categories overlap with O'Flynn's. Maggie Burnette Stogner argues for three nonexclusive categories, based not on conceptual purity but on perceived areas of media activity, within a general trend of production that she calls "user-centric": participatory (an entirely distributed and mostly unstructured experience), collective (an experience that involves participation within a structure), and mobile (in which participation is often overlaid on the physical world and experiences within it).StoryCode designers, professionals who create transmedia works, describe the range with the graphic (Abiodun and Knowlton) shown in Figure 1.Thus, not even taxonomies are yet stable in this kind of work. The conceptual problems in imagining such work are complicated not only by the level of interactivity but also by the fact that the interactivity takes place, potentially, across so many spaces and platforms in a user's life. The environment within which such work is located now encompasses both physical and virtual space, represented wryly by Gary Hayes as shown in Figure 2. …