Writer is the module dedicated to build office text related documents such as letters, books, contracts etc. Writer consist on an xml format link to stylesheets which are all concentrated on a stilyst.
The stylist whill contain the different styles that the document might contain including Page style, character style, paragraph styles and list styles.
Writer also includes a navigator which allows to easily browse large documents on a quick and organized manner. The navigator also transforms into a content manager when it works as Master Template designer. This tools differenciate the word processing experience from other office suites out there.
Writer is the most intensive module from the OpenOffice.org suite, it uses most of the components that OpenOffice.org has and also is the most versatile, the same module work for the HTML editor and the project can be found at http://sw.openoffice.org/