问题描述
我正在生成供客户端使用的XPaths服务器端，我感到困惑的是为什么 only 表路径（即 td
I am generating XPaths server-side for use on the client-side, and I was puzzled as why only table paths (i.e. content in a td) couldn't be found in the DOM.
结果是，现代浏览器（至少是Chrome和Firefox）插入了 tbody 加载文档时在表行周围添加标记。请参见是有效的HTML5，尽管它既没有 head 也没有 body 元素和任何HTML5解析器应该添加它们，以便DOM树看起来像
In SGML/HTML4 terminology some other elements can be inferred, even the head and the body element can be inferred, and HTML5 continues that. So a document like http://home.arcor.de/martin.honnen/html/test2012011901.html is valid HTML5 although it does neither have head nor body element and any HTML5 parser is supposed to add them so the DOM tree looks like
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
</head>
<body>
<h1>Test</h1>
<p>This is a test.</p>
</body>
</html>
我无法告诉您有关其他元素的所有详细信息，以上仅是示例。在。
I can't tell you all details about other elements, the above is only an example. Look for details in http://www.w3.org/TR/html5/syntax.html#optional-tags.
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