A sitemap is an XML file that provides a list of all links available on a site. It was originally invented by Google in 2005, and so is often referred to as a "Google Sitemap". It is especially useful for sites that have dynamic pages that are only available through the use of forms and user entries, has a large archive of content that isn't available directly through navigation, or has pages that are launched using Flash. The sitemap indicates to crawlers how such pages can be found. Google, MSN, Yahoo and Ask all support the Sitemaps protocol. The sitemap is an XML file located at /sitemap.xml. XML sitemaps have replaced the older method of "submitting to search engines" whereby a form is filled out on the search engine's submission page. Instead, the it is now possible to submit the sitemap directly.