In Decision Model and Notation (DMN), the “Input Data” symbol is used to represent the source of data that will be used in the decision-making process. An Input Data element is a representation of an external data source, which may be a database, a spreadsheet, a file, or any other type of system that provides data for the decision model.
The Input Data symbol is represented as a rectangular box with rounded corners. The name of the Input Data element is usually placed inside the box. The Input Data element is connected to other elements in the decision model using arrows that indicate the flow of data.