Template:Tbl

{{subst:subst}}#ifexpr:{{{2}}}>0|{{subst:subst}}tbl|{{{1}}}||{{subst:{{{1}}}|{{{2}}}|{{{3}}}}}}} |- |{{{2}}}||{{subst:{{{1}}}|{{{2}}}|{{{3}}}}}}}

Substituting this template produces one or more new substitution template calls, allowing recursive change of a page, see Help:Recursive conversion of wikitext.