Dear Ravi,
On the copyright question AFAIK... it is the manner in which a certain content is expressed (e.g. analyzed, compiled, paginated, represented, etc..) the author could claim copyright, as there is a certain basic amount of creative labour that went into it. So Govt. of Karnataka could rightfully copyright these works, which it has now released under CC-BY-SA 3.0. A useful thing to read in this context would be this [1].