<http://schema.org/headline>
"\u300C\u8133\u3068\u30B0\u30EA\u30A2\u7D30\u80DE\u300D\uFF1A\u65B0\u520A\u30D4\u30C3\u30AF\u30A2\u30C3\u30D7"^^<http://www.w3.org/2001/XMLSchema#string>
<http://gihyo.jp/book/pickup/2011/0011>