DIKW stands for "Data Information Knowledge and Wisdom" which is called Knowledge Hierarchy, Knowledge Pyramid, Information Hierarchy or Information Pyramid. To learn more about this issue, you can have a look at this site or this one. However, I would recommend you to read this paper: Rowley, J. (2006). 'Where is the wisdom that we have lost in knowledge?' Journal of Documentation 62 (2), pp. 251-270. This paper provides you with a profound vision about the real meaning of wisdom which is rarely discussed in KM literature.