“…Complex languages can be useful where the searcher wants to be very precise through the use of a detailed query (e.g., Pirkola, Puolamäki, & Järvelin, 2003) or where the data themselves are complex, for example, music data, which comprise different attributes such as timbre, tone, and pitch (Downie, 2004), each of which might be expressed as individual query components. Niemi, Junkkari, Järvelin, and Viita (2004) provide an example of the latter approach.…”