"The seemingly endless series of changes in the official DOD definition of information warfare-a different one in each of the three years the School of Information Warfare & Strategy has existed-reflects the lack of conceptual certainty about what IW is and where it fits into the range of elements of national power. The fact that there is no universally-accepted understanding of IW is certainly no surprise, given its newness; for comparison, ask a group of military officers to define 'strategic airpower' or 'maneuver warfare' and you'll get a variety of answers, even though these have been exercised for most of this century. The intent of this paper is to suggest an approach that leads to an understanding of not just IW, but how it fits into the full range of national information power."
Strategic Forum No. 115
NDU Press, Strategic Forum: http://www.ndu.edu/inss/Press/NDUPress_STRFOR.htm