This content type allows you to edit svg graphics in your browser using svg-edit (http://code.google.com/p/svg-edit/). Since the IE still doesn't support SVG graphics the SVG graphic is converted to a PNG image when saved. So the browser only needs to support SVG for editing not for viewing the graphic.
Just add collective.editablesvg to your eggs and zcml section in your buildout
copyright 2011 by Dominik Ruf, licensed under the GPL. See docs/LICENSE.txt for details.