"Announcing industry supported Sitemaps is an important milestone for all of us because it will help webmasters and search engines get the most relevant information to users faster. Sitemaps address the challenges of a growing and dynamic Web by letting webmasters and search engines talk to each other, enabling a better web crawl and better results," said Narayanan Shivakumar, Distinguished Entrepreneur with Google. "Our initial efforts have provided webmasters with useful information about their sites, and the information we've received in turn has improved the quality of Google's search."

"The launch of Sitemaps is significant because it allows for a single, easy way for websites providing content and metadata searching engines," said Tim Mayer, senior director of product management, Yahoo Search. "Sitemaps helps webmasters surface content that is typically difficult for crawlers to discover, leading to a more comprehensive search experience for users."

"The quality of your index is predicated by the quality of your sources and Windows Live Search is happy to be working with Google and Yahoo on Sitemaps to not only help webmasters, but also help consumers by delivering more relevant search results so they can find what they’re looking for faster," said Ken Moss, General Manager of Windows Live Search at Microsoft.

The protocol will be available at sitemaps.org, and the companies plan to have Yahoo Small Business host the site. Any site owner can create and upload an XML Sitemap and submit the URL of the file to participating search engines.