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

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/

The MDN is also a good reference.