Navigation queries and multiplicity of targets:
Navigation queries often seek to answer the question, “What is the best route to travel from a point A to a point B?” Here the best route is determined by the cost of the route in terms of distance, accessibility, mode of transport, etc. In indoor environments these queries are constrictive because in these environments the intent to travel is seldom as simple as moving from a point A to a point B. In many cases several users must be navigated simultaneously, or the target points are several or the target points are dynamic. Therefore, indoor navigation queries have to be expanded to accommodate a range of more complex/dynamic scenarios such as a case of fire emergency.