In the recent Wolfram Alpha demonstration, Google announced the launch of their structured data feature. The new feature will enable you to compare and find public data.
The new feature will make way for public data to take a more centralized approach in informed public conversation. For example, if you search for population followed by a U.S. state or county, you will see estimates that look like this:

To get a more detailed graph just click on the result. This interactive chart will enable you to add or remove data for different geographical locations.
Here's a quick video demonstration:
Google also promised to add public data for answers on prices of cookies, asthma frequency, bakers’ salaries, number of wildfires amongst others. At present this information is being collected by the U.S. Bureau of Labor Statistics and the U.S. Census Bureau’s Population Division. However, Google hopes to bring in more public data sources.
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{ 2 comments… read them below or add one }
As a marketing guy and political activist as well a being a generally curious person, I would use a centralized data collection resource frequently so I’d enjoy it. Of course just like all data, the interpretation is up to the individual but it might make an interesting resource for challenging many of the biased polls, claims and remarks people often make. Let ‘er rip!
This is not really a structured data searching in a sense that it is the good ol’ OneBox module hard-coded for a single SQL statement going against a single table in one public database. Queplix is doing really structured data with Google Search appliance combination going in real time against all using users’ security extracted from these apps ACLs, applications, without any hardcoded SQL. Of course for this particular application (i.e. asthma frequency, bakers’ salaries, etc) it makes sense to use public Google search; For everything else within enterprise GSA must be deployed only in tandem with Queplix secure search appliance.