The ABW file format is the default document format for the AbiWord word processing software and the format is based on XML. The ABW file format allows for advanced document layouts, rich text formatting, lists, tables, images and footnotes. ABW files are similar in nature to Microsoft Word DOC files, however, unlike Microsoft Word files, the AbiWord program can run on almost any computer operating system.
This format is used to store images that have been divided into Y, U, and V color components. In this case, Y corresponds to brightness, and the variables U and V correspond to color information. This format is able to store more accurate color information than the RGB color space. The YUV Color System also allows you to store video files and save a particular sequence of images.