It does not. SGML is a text format only, so it never includes figures or page images. It is an ISO standard, and electronic vendors can read and use it. Rather, we usually take SGML and translate it into something else when we make electronic products. The key, however, is that we can easily translate it, because it is so well-defined.
T here are two good formats to consider for graphics.
These have grown to become industry standards. Vendors can readily exchange, read, and use these formats. TIFF files have the added benefit of being relatively small compared with EPS files, because TIFF uses standard compression factors. Resolution is a truly important part of graphics. Graphics are usually scanned around 300 dpi for halftones, and 600 or 1200 dpi for combination or line art.