html5lib 是一个 Ruby 和 Python 用来解析 HTML 文档的类库，支持HTML 5 以及最大程度兼容桌面浏览器。

主要特性包括：

• Parses valid and invalid HTML documents to a tree
• Support for minidom, ElementTree (including cElementTree and lxml.etree), BeautifulSoup and custom simpletree output formats
• DOM to SAX converter
• Reports parse errors
• Character encoding detection
• XML mode for working with illformed XML e.g. feeds
• Filtering and serializing of trees
• HTML+CSS sanitizer
• Many unit tests
• Faster than before :)

该项目主页:http://code.google.com/p/html5lib/

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