Data mining is actually a misnomer of KDD, knowledge discovery from data, who means extraction of interesting (non-trivial, implicit, previously unknown and potentially useful) patterns or knowledge from massive data.
Obviously, the object is data. What data? Thinking of the structure of data, we can divide the data into unstructured data and structured data or semi-structured data.
Like the web data and text data.
Mmultimedia data such as videos, graphs, music.
Social networks and information networks.
Data from sensor…
Relational data or object-relational data…
Data Mining is a work of multi-dimensional view.
原文：http://blog.csdn.net/jacketinsysu/article/details/43793289
