The Scalable Vector Graphics (SVG) file format has been around since 2001, but is rarely seen by printers, mainly because it's a web-based file. SVG files are basically Cascading Style Sheet (CSS) code that illustrates vector files in a browser. They're used by web designers frequently because of their small file size and high-quality for vector graphics. If you come across one as a printer, it's recommended you contact the client and request new artwork. However, if that's not possible, it's as simple as opening the file in Illustrator and saving an EPS file. You will need to confirm and adjust colors with the client because SVG files convert all colors to RGB.