Algorithm 3. ConstructAntRules(c, Prob).

1: Set $g\leftarrow 2$.Generation counter

2: while g ≠ |attributes| And coverage ≤ minCoverage do

3:  Set $MultiRules\leftarrow \varphi$Multi-term rules

4:  Set $t\leftarrow 1$ Ant index Ant index

5:  repeat

6:   Let ant t construct a maximum of g-term rule such that (rule => c) using selection probability prob.

7:   Set $t\leftarrow t+1$

8:  until t > noO f Ants

9:  for Each rule constructed by ants do

10:   Calculate support and confidence of rule

11:   if support ≥ minSupp And ≥ minConf then

12:    Set $MultiRules\leftarrow MultiRule\cup rule$

13:   end if

14:  end for

15:  Set $coverage\leftarrow find\mathrm{\_}coverage(multiRules)$.

16:  Update pheromone.

17:  Set $g\leftarrow g+1$

18: end while

19: return MultiRules