Google, Microsoft and Yahoo collaborate in search

The search engine providers have launched to improve crawling of structured data

In a rare display of collaboration, Google has joined forces with its search rivals Microsoft and Yahoo in a project intended to improve the Web crawling and indexing of structured data, which often originates in databases and loses its format when converted into HTML.

The three companies have launched a site called, which contains a common set of HTML tags that they hope webmasters will use to mark up structured data on their sites.

" aims to be a one stop resource for webmasters looking to add markup to their pages to help search engines better understand their websites," Google said in a blog post.

By promoting the use of these common tags across the Web, Yahoo, Microsoft and Google expect that their search engines will be better able to identify, crawl and index structured data.

"Many applications, especially search engines, can benefit greatly from direct access to this structured data. On-page markup enables search engines to understand the information on web pages and provide richer search results," reads a message in's home page. contains more than 100 different HTML tags for structured data categories like events, organizations, people, places, products, reviews, ratings, movies and books.

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Juan Carlos Perez

IDG News Service
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