This has many examples in the wild, such as HTML DOCTYPE, some USES of XMLNS, a version identifier inside your PDF document.

这样的例子有很多，如HTML DOCTYPE,XMLNS的某些使用或PD F文档中的某个版本标识。

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First, the only trigger for a browser to parse in standards mode is a DOCTYPE as the first line of an HTML or XHTML document, as Listing 1 shows.

首先，让浏览器用标准模式解析的惟一条件是HTML或XHTML文档的第一行包含DOCTYPE，如清单1所示。

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While the DOCTYPE declaration informs a browser to use standards mode, it will still parse the HTML according to the rules in that DTD — in this case, HTML 4.0.

虽然DOCTYPE声明告诉浏览器使用标准模式，但是它仍然会根据那个DTD——即HTML 4.0的规则去解析html。

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So if you've got a doctype that claims XHTML 1.0 strict, and your page really is HTML 4.01 transitional, the Validator will tell you that.

所以如果您已经获得声称是XHTML 1.0严格版的doctype，而此页面实际上是HTML 4.01过渡版，Validator将会告诉您这些。

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This is the canonical doctype for HTML 5 Web pages.

这是用于HTML5web页面的规范doctype。

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A mortal web designer who attaches a DOCTYPE tag to their web page saying, "this is standard HTML," is committing an act of hubris.

一个web设计者挂了一个DOCTYPE标签到他的网页上，说，“这是标准的HTML”，这是一种很傲慢的举止。

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Change your document to use the HTML 4.01 Strict DOCTYPE, and then validate your document, fixing each error reported.

将文档改为采用HTML 4.01StrictDOCTYPE，然后验证文档并修改报告出的错误。

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Change your document to use the HTML 4.01 Strict DOCTYPE, and then validate your document, fixing each error reported.

将文档改为采用HTML 4.01StrictDOCTYPE，然后验证文档并修改报告出的错误。

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