Where can I find CSS Locator Reference?

Where can I find a complete of开发者_开发知识库ficial reference of CSS Locators?

Thanks

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Did you mean CSS selectors?

CSS2: http://www.w3.org/TR/CSS2/selector.html

CSS3 (subject to change): http://www.w3.org/TR/css3-selectors/

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The MDN is also a good reference.