The document describes the Universal Widget API (UWA) which aims to create widgets that work across multiple platforms without code changes. It outlines the basics of UWA including using a static XHTML file with CSS and JavaScript. It presents a skeleton structure for UWA widgets and provides examples including a fliptext widget and a fireplace widget. It also discusses replacing native JavaScript methods with UWA-specific equivalents and the Ajax methods available in the UWA.Data object.