Niall Kennedy points to what looks to be a new Google API format, the Google Data API or GData for short, which it says is based on existing formats of Atom and RSS 2.0 (and here). It's designed to let you send requests for data and get back results as an Atom or RSS feed.
Optimising Digital Marketing Campaigns with Search, Social and Analytics
At SES London (9-11 Feb) you'll get an overview of the latest tools, tips, and tactics in Paid, Owned, Earned, Integrated Media and Business Intelligence to streamline your marketing campaigns in 2015. Register by 31 October to take advantage of Early Bird Rates.