Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in drupal_get_feeds() (line 394 of /home/aphoto/domains/v.sytnik.lviv.ua/public_html/includes/common.inc).
In "Drawings in SVG format. Part 1 - Draft Standard" is an example of the object model of the drawing, reference scale and line styles.
Building on the basic principles of drawing for 2D Compass-graphic set up a test alpha version of the library exports to SVG.
Wikipedia's open and see what they write about formats .DXF and .DWG and their development.
DXF - open file format for the exchange of information between the graphical CAD applications. Was first introduced in December 1982 as part of AutoCAD 1.0, as a data exchange format that provides the same information as the enclosed format AutoCAD - DWG, specification of which have never enjoyed.
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?