Below are 3 versions of <img src="svgimage/baked%20beans.svg" /> with differing size attributes. The ability to use SVG files in <img> makes W3C SVG files trivial to use and is great for accessibility. It is also very useful for responsive web design, which needs scalable images as one of its defining features. Hopefully we are finally seeing support for and uptake of SVG after many years in the wilderness. It would also be good if Windows explorer showed thumbnails of SVG files as it used to do with the old WMF format (Linux and OS X work fine). Here's the browser support as listed in CanIUse.com.
This symbol is part of the the http://straight-street.org open symbol set designed for use with/by people with communications difficulties. When we first worked on the API and test page, using SVG was pretty painful and involved namespaces and other complexities.