In this paper, a DTD (Document Type Definition) XmlLayout for document layout analysis is presented. The paper will focus on its finality and on the role that it can play in a document recognition framework. At first, we shall show how this DTD can interact in the communication between the system processes, and second, we shall explain its implementation into C++ , and finally we'll describe its use in the visualization methodology based on the SVG (Scalable Vector Graphics) DTD.