The parse will fail if you receive HTML from a form login or an HTML error page from the server.

如果您接收到来自表单登录的HTML或一个来自服务器的HTML错误页面，那么解析就会失败。

youdao

Rather than put that information into the Hypertext Markup Language (HTML) of the page in any old way, add some standardized HTML tags and Cascading Style Sheet (CSS) class names.

过去的方法是将这些信息放置在页面的超文本标记语言(HTML)中，微格式摒弃了这种做法，而是添加一些标准化HTML标记和层叠样式表(CSS)类名。

youdao

Now you can perform more actions, like changing the HTML structure of the HTML page.

现在您可以执行更多的操作，例如更改html页面的HTML结构。

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Apple wants a new language for Web page design, called HTML 5.

VOA: special.2010.06.22

Perhaps you have seen CSS Zen Garden where the same basic HTML page is rendered in extravagantly different forms solely through applying a different CSS file?

FORBES: The Big Fix #2: Should Apple Be Broken Up?

Boxee now supports HTML5 apps, which means that if you write an HTML page designed for 10ft it will work on any Boxee and Google TV devices, and hopefully other platforms will embrace this trend rather than try and invent their own platforms, which makes life hard for content owners, developers and ultimately slows down innovation in this space.

FORBES: Boxee vs. Apple TV: the "fanboys" take on their idols

As Gaffney notes, enforcement of keyword association could prove difficult for FDA. Unlike visible words, metadata sits in the source code and HTML of a page, and is largely invisible to the untrained eye.

FORBES: FDA Regulates Internet Search