model{
  x1 ~ dpois(5);          # x1 is Poisson with lambda=5
  x2 ~ dnorm(3, 1/2^2);   # x2 is Normal with mu=3 and sigma=2
                          # note how JAGS ises tau=1/sigma^2 ! 
  x3 ~ dbin(0.5, 10);     # x3 is Binomial with p=0.5 and n=10
                          # Watch the order!
  x4 ~ dexp(1/7.);        # x4 is exponential with tau=7 (r=1/tau=1/7)
}