All > Relax NG > Simplification - define and ref elements

• Test 210 ( A definition, which leads to a loop (the define element is expandable). )
• Test 211 ( The root element is "foo" and it can contain an infinitely nested "bar" elements (but at least one). )
• Test 212 ( This recursive definition does not cause a loop, because the define element is not referenced by a reachable ref element and is removed and not expanded. )