The article is devoted to the description of the mode of presentation of elements and topology of schemes of outdoor technological equipment, such as schematic plans of stations, two-line plans of stations and traction current canalization schemes in the branch format for technical documentation for interlocking devices. The drawing of schematic plan is considered as a non-scale single-line image of the station’s track development. An approach to consideration of the elements of this drawing is based on the fact that currently there are about 100 basic symbols for elements displayed in the drawings outside technological devises. In addition, some types of elements are displayed differently in different outside technological devises drawings. In this way all elements images displayed in the drawings are proposed to be divided into two large groups - dynamic and static. Basic elements of schematic plans of the stations, including those describing the topology of the station, are suggested to represent by means of dynamic elements. Each of these elements will comprise both a graphical representation of the specifi c entity in the drawing and the parameters of the real device of the railway station. Also in this article an approach for representing the schematic plan of the station as a graph is proposed, because the elements of the path development completely describe the topology of the station, and the location of each element, except the path section, can be specifi ed as a point, and the path segment - as a segment. So the topology of any station is proposed to be described by two sets: a set of points showing the topology of the schematic plan and the set of segments formed by the points of the set. Thus, by means of single elements and connections between them, this approach will enable to build more complex data structures, the basic of which is the track circuit. This approach enables to form a model of the track circuit, which can be obtained automatically from the technical documentation. Many of the nuances were simplifi ed and not too detailed to facilitate understanding of the concept of description. Full and general description of the framework can be obtained in the offi cial technical documentation.