Modular technology of developing of the extensions of a CAD system.   Axonometric piping diagrams. Parametric representation
  Applying the modular technology of developing of the problem-oriented extensions of a CAD system to a problem of automation of creating of the axonometric piping diagrams on an example of the program system TechnoCAD GlassX is described. The proximity of composition of the schemas is detected for special technological pipe lines, systems of a water line and water drain, heating, heat supply, ventilating, air conditioning. The structured parametric representation of the schemas, including properties of objects, their link, common settings, settings by default and the special links of compatibility is reviewed. 
Vladimir V. Migunov, Rustem R. Kafiatullov, Ilsur T. Safin