SVG is a markup language, scalable vector graphics, created by World Wide Web Consortium (W3C), designed for describing two-dimensional vector and mixed vector / raster graphics in XML. Supports both and animated, interactive graphics and declarative scripting. Not support the description of three-dimensional objects. The basis of SVG VML formed markup languages and PGML.

Is a format used in the MobiPocket Reader software on desktop and mobile platforms. Books in this format can have .prc and .mobi file extensions. MOBI was originally based on the PalmDOC format; adding HTML tags made it possible to create a high-compression version which compresses data to a high degree. There are a number of formatting restrictions – the text cannot be indented, and inserted tables and images cannot be formatted.