Figure 1.

Screen capture of the OpenSDE data entry application. The left-hand side shows the domain model tree, which contains medical concepts. On the right is the form on which data are entered. The form is associated with the selected node, in this case, “skin ulcer.” The brackets on the left (included in this figure as examples) indicate that two different ulcers are described: ulcer 1 on the right shin (see entry form) and ulcer 2 on the left shin (location is hidden in this view). Ulcer 1 consists of two descriptions over time (progress descriptions); the first description (1.1; shown on entry form) is of June 2003, describing the probable cause of the ulcer in May 2003; progress description 2 (bracket 1.2) shows the progression of the ulcer on September 10, 2003. Progress description 2 contains two descriptions of pain to indicate that pain is continuously mild (Ulcer Description 1/bracket 1.2.1) and intermittently severe (Ulcer Description 2/bracket 1.2.2).