\setupbackend[export=yes]

\starttext
    \startitemize[n]
        \starthead {Head 1}
            Test 1
        \stophead
        \starthead {Head 2}
            Test 2
        \stophead
        \startitem
            Test 3
        \stopitem
        \startspecialitem[sym]{!!!}
            Test 3
        \stopspecialitem
        \startspecialitem[sub]
            Test 4
        \stopspecialitem
        \startspecialitem[mar]{foo}
            Test 5
        \stopspecialitem
    \stopitemize
\stoptext
