In addition to repurposing content, XML’s single source capability decreases errors in content and ensures consistency of format throughout entire Web sites and between formats for multiple devices. With today’s fast pace of information flow, changes to content can be frequent. Since content often appears in more than one place on a Web site, executing those changes can also be challenging. Without a single content source, a Webmaster might not be able to update all instances of the outdated content and thus risk inconsistency of presentation.