isting the
kind of each variable next to its declaration.</p>
<pre class="stan"><code>data {
  int&lt;lower=0&gt; N;           // unmodeled data
  real y[N];                // modeled data
  real mu_mu;               // config. unmodeled param
  real&lt;lower=0&gt; sigma_mu;   // config. unmodeled param
}
transformed data {
  real&lt;lower=0&gt; alpha;      // const. unmodeled param
  real&lt;lower=0&gt; beta;       // const. unmodeled param
  alpha = 0.1;
  beta = 0.1;
}
parameters {
  real mu_y;          