data,information and knowledge

Data: symbols
Data is raw. It simply exists it doesn’t have any meaning of itself.
Information: data that are processed to be useful.
Information is data that gives meaning. This meaning is useful.
Knowledge: application of data and information
Knowledge is appropriate collection of information, which is useful knowledge is deterministic process.

Gene Bellinger, Durval Castro, Anthony Mills
reference:http://www.systems-thinking.org/dikw/dikw.htm