Scalable Vector Graphics (SVG) it’s a XML apllication to represent vector graphics.
SVG is a W3C recommendation. It’s a standard, not a proprietary technology, scalable, device independent, interactive, semantic, interactive (excellent alternative to Flash), etc.
– About SVG – 2D graphics in XML (Official overview W3C of the Scalable Vector Graphics (SVG) format).
-W3Schools – SVG tutorials, examples and references
– W3C SVG Working Group
– Scalable Vector Graphics (SVG) 1.1 (Second Edition) – W3C working draft 22 June 2010
You can know more of The secret origin of SVG.