A data model of a modeled environment is maintained within a database. The data model includes data defining a plurality of hierarchically arranged subsets of space within the modeled environment and data defining a plurality of items populating the modeled environment. A data processing system displays within a display device at least first and second windows. The first window displays a map of the modeled environment, where the map includes at least one user-selectable graphical element representing one of the plurality of hierarchically arranged subsets of space or one of the plurality of items. In response to a first user input, a graphical element is copied from the first window and displayed within the second window. In response to a second user input selecting the graphical element within the second window, data from the database associated with the subset of space or item represented by the graphical element is presented.