Arbortext Editor supports the use of XSL-FO stylesheets for printing, previewing, and creating PDF files. XSL-FO stylesheets use a vocabulary defined by the Extensible Stylesheet Language (XSL) to specify a document's formatting. This vocabulary defines a set of elements, referred to as formatting objects (FOs), and attributes, referred to as properties. Formatting objects specify the production of a given kind of published object (such as a block, a list, or a graphic). Properties applied to formatting objects specify additional details about how these published objects should be formatted (such as font size, color, indent).