Official Google Webmaster Central Blog: Surfacing your business's contact and local info in Google

Another schema.org extension to help "organize the world's information and make it universally accessible and useful"

"Every day, searchers use Google to find information about businesses. Common queries include finding the phone number for customer service, the location of a business, and opening hours.
This information is typically found in a business's location page or a "contact us" section of a company's website. When Google correctly identifies these pages and is able to extract the relevant information from them, it is more likely to surface that information to searchers looking for the business.
Today we would like to share our recommendations for helping Google identify and surface this information."

Official Google Webmaster Central Blog: Surfacing your business's contact and local info in Google