Structured Data on the Web Alon Halevy Google Though search on the World-Wide Web has focused mostly on unstructured text, there is an increasing amount of structured data on the Web and growing interest in harnessing such data. I will describe several current projects at Google whose overall goal is to leverage structured data and better expose it to our users. These projects include crawling the deep web, collecting and mining the HTML tables on the Web, and computing aspects for search queries to better organize answers. In each case, I will focus the lessons learned from the project and the opportunities that lie ahead. I will also discuss the opportunities relating to creating and managing data on the Web.