Abstract: Generating graphical user interfaces (GUIs) from XML DTD files. A user selects the DTD file for which a GUI is to be generated. The DTD file is parsed to identify the different elements present in the DTD file. The identified elements are represented in the form of a binary tree-like data structure referred to as a DTD binary object. The DTD binary object can be used at run-time to quickly construct the GUI forms. The GUI forms contain several edit fields where the user can enter data. The DTD binary object extracts the data entered by the user and saves the GUI form in XML format.