2.1.5 [CSS-Level2-2009] Section 4.1.8, Declarations and properties

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V0183:

The specification states:

 A declaration is either empty or consists of a property name, followed by a colon 
 (:), followed by a property value. Around each of these there may be white space.

Quirks Mode and IE7 Mode (All Versions)

Bad selector declarations are not ignored.

V0184:

The specification states:

 A user agent must ignore a declaration with an invalid property name or an invalid 
 value. Every CSS property has its own syntactic and semantic restrictions on 
 the values it accepts.

Quirks Mode and IE7 Mode (All Versions)

Invalid values are not ignored and cause the rule to fail. Such invalid values include spaces, slashes, and valid keywords. Invalid values that are functions are also included.