On the Internet you can find a lot of different information about creating drawings in the format SVG. More often invited some editor and export of DXF format to SVG. Looking through the code SVG immediately obvious that there is a lot of excess. Created in a file editor, SVG may not always correctly revealed in the other. One happy that browsers started to support the SVG format. Everywhere they write about the disadvantages of using SVG. Perhaps it is necessary to adhere to common rules of the file to display the drawings?