URI dup05 = URI.create("http://fortytwo.net/2007/05/ripple/stack#dup");
URI dup08 = URI.create("http://fortytwo.net/2007/08/ripple/stack#dup");
RippleValue dup05Val = mc.canonicalValue(mc.valueOf(dup05));
RippleValue dup08Val = mc.canonicalValue(mc.valueOf(dup08));
assertNotNull(dup05Val);
assertNotNull(dup08Val);
assertTrue(dup05Val instanceof PrimitiveStackMapping);
assertTrue(dup08Val instanceof PrimitiveStackMapping);