• ID
• Class
• Element

• 1-0-0
• 0-1-0
• 0-0-1

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Examples

The * selector, or global selector, has no value.

* {} 0-0-0 

Combinators, like ~, >, and + have no value

ul li {} 0-0-2
ul > li {} 0-0-2

:not has no value, but parameter selector does

.myClass:not(p) {} 0-1-1

Specificity is not inheritance