How to let Google detect a site search engine?

Question

Google Chrome has a feature where you can hit tab to search a site. Chrome then navigates to the site\'s own search engine and runs the inputted query. The Chrome documentat

Answer 1

After a little digging I found this page that describes this. Also you can read in Stackoverflow's source code and find this line of code:

What it does is indicate to Google that the description for how to use your search engine in the file /opensearch.xml which contains this:

  Stack Overflow
  Search Stack Overflow: Q&A for professional and enthusiast programmers
  UTF-8
  http://sstatic.net/stackoverflow/img/favicon.ico