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The following are links to tools that generate or maintain files in the XML Sitemaps format, an open standard defined on sitemaps.org and supported by the search engines such as Ask, Google, Microsoft Live Search and Yahoo!. Sitemap files generally contain a collection of URLs on a website along with some meta-data for these URLs. The following tools generally generate "web-type" XML Sitemap and URL-list files (some may also support other formats).
SitemapGenerators - sitemap-generators - A collection of links to tools and code snippets that generate Sitemap files. - Sitemap generators create a Sitemap compliant with the Sitemap Protocol of sitemaps.org.
Rich snippets (microdata, microformats, and RDFa) - Webmaster Tools Help
About rich snippets and structured data Snippets—the few lines of text that appear under every search result—are designed to give users a sense for what’s on the page and why it’s relevant to their query. If Google understands the content on your pages, we can create rich snippets—detailed information intended to help users with specific queries. For example, the snippet for a restaurant might show the average review and price range; the snippet for a recipe page might show the total preparation time, a photo, and the recipe’s review rating; and the snippet for a music album could list songs along with a link to play each song.