May12, 2009 was the historical moment in Google history, when at searchology event, launched a new searching tool named Google Squared. This is the best effort in web 3.0 and semantic searcrh. It is the effort of structuring the unstructred data on web pages and in process they extract data from the web pages and presents the search results as squares in an online spreadsheet format.The San Francisco Chronicle described the feature in a bit more detail that it compiles details from several Web pages and organizes them into a table on a single page, with multiple columns like a spread sheet. One of the features announced today is called Search Options, which is a collection of tools designed to let users better "slice and dice" their search results so they can manipulate the information they're getting. Mayer said the tools should help people who struggle with what exactly what query they should pose."
Let's say you are looking for forum discussions about a specific product, but are most interested in ones that have taken place more recently," she wrote. "That's not an easy query to formulate, but with Search Options you can search for the product's name, apply the option to filter out anything but forum sites, and then apply an option to only see results from the past week."One Search Options tool is geared toward giving users more information when they do a search. For instance, instead of just getting results in text form, they could have the search engine return images as well.Google acknowledged that this was still very much a “labs” feature that was imperfect at best. However, between Wolfram Alpha, Google’s efforts in semantic search, and a host of competitors that will be popping up in this field, we may very well be on the edge of Search 3.0. This is good news for our students, teachers, and library scientists struggling to help our students get the information they want from the billions of pages of junk (and millions of pages of interest) floating around the web. In that same layer Google also is adding more information to its results snippets -- those little pieces of text that tell you about the site that's been pulled up. If you're searching for a hotel, for example, the snippet won't just tell you the name of the hotel and where it is -- now it could tell you its price range, number of stars in customer reviews and the number of reviews listed. Google Squared still needs a lot of improvement, which is why it's being released to Labs. It collects the information by looking for structures that seem to imply facts. The squares are built out based on high probability of facts. There will be concerns over Google providing this data on its own by grabbing data and serving it up without sending searchers to the sites that provided the info.
For more reading following links may be helpful ------
Screenshots of Google Squared