{"author_name":"m-hiyama","title":"BNF\u3001EBNF\u3001ABNF\u3001\u307e\u30fc\u6b63\u898f\u8868\u73fe\u3060\u306a","published":"2010-02-02 12:25:08","version":"1.0","categories":["\u96d1\u8a18\uff0f\u5099\u5fd8"],"description":"BNF\u3068\u304b\u6b63\u898f\u8868\u73fe\u306e\u8a71\u3092\u3002\u30df\u30cb\u30de\u30e0\u306aBNF\u3068\u6b63\u898f\u8868\u73feBNF\uff08\u30d0\u30c3\u30ab\u30b9\uff0f\u30ca\u30a6\u30a2\u8a18\u6cd5\uff09\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u69cb\u6587\u8a18\u8ff0\u306b\u3088\u304f\u4f7f\u308f\u308c\u308b\u30e1\u30bf\u69cb\u6587\u3067\u3059\u3002\u3082\u3068\u3082\u3068\u306f\u3001\u300c?\u300d\uff08\u7701\u7565\u53ef\u80fd\uff09\u3084\u300c*\u300d\uff08\u4efb\u610f\u56de\u306e\u7e70\u308a\u8fd4\u3057\uff09\u306e\u3088\u3046\u306a\u8a18\u53f7\u306f\u4f7f\u308f\u306a\u304b\u3063\u305f\u3088\u3046\u3067\u3059\u3002\u73fe\u5728\u306e\u6b63\u898f\u8868\u73fe\u3067\u6a19\u6e96\u7684\u306b\u4f7f\u308f\u308c\u308b\u300c?\u300d\u300c*\u300d\u300c+\u300d\u306f\u3001\u306a\u304f\u3066\u3082\u6b21\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u53ef\u80fd\u306a\u306e\u3067\u3059\u3002\uff08\u4ee5\u4e0b\u3067\u3001EMPTY\u306f\u305d\u3053\u306b\u4f55\u3082\u306a\u3044\u3053\u3068\u3067\u3059\u3002\u307b\u3093\u3068\u306b\u4f55\u3082\u7121\u3044\u3068\u5206\u304b\u308a\u306b\u304f\u3044\u306e\u3067\u76ee\u5370\u306bEMPTY\u3092\u4f7f\u3044\u307e\u3059\u3002\uff09 // X \u306f A? X ::= EMPTY | A // Y \u306f A* Y ::= EMPTY | A Y // Z \u306f A+ Z ::= A | A Z \u300c|\u300d\u2026","image_url":null,"blog_title":"\u6a9c\u5c71\u6b63\u5e78\u306e\u30ad\u30de\u30a4\u30e9\u98fc\u80b2\u8a18 (\u306f\u3066\u306aBlog)","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fm-hiyama.hatenablog.com%2Fentry%2F20100202%2F1265081108\" title=\"BNF\u3001EBNF\u3001ABNF\u3001\u307e\u30fc\u6b63\u898f\u8868\u73fe\u3060\u306a - \u6a9c\u5c71\u6b63\u5e78\u306e\u30ad\u30de\u30a4\u30e9\u98fc\u80b2\u8a18 (\u306f\u3066\u306aBlog)\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","type":"rich","provider_name":"Hatena Blog","blog_url":"https://m-hiyama.hatenablog.com/","height":"190","url":"https://m-hiyama.hatenablog.com/entry/20100202/1265081108","author_url":"https://blog.hatena.ne.jp/m-hiyama/"}