This ES will employ decision tree approach in knowledge
base representation [11]. The decision tree approach itself is
basically a collection of nodes that are connected each other.
These nodes are categorized as root node, decision node, and
leaf node. The root node represents first fact that will be an
initial point where seeking process for identifying emerging
symptoms is started. This identification will provide options to
walk through other branches into other nodes, either decision
node or leaf node. The decision node owns identical purposes
with root node, but it is not located in the initial position. Leaf
node is particularly a node that marks the ending position of a
tree. This leaf node must be a decision that points to a
particular solution.