W3C CSS2 Cascading Style Sheets, level 2 - instructional media + ...

P[example="public class foo\
{\
private int x;\
\
foo(int x) {\
this.x = x;\
}\
\
}"] { color: red }
4.1.8 Declarations and properties
A declaration is either empty or consists of a property, followed by a colon (:),
followed by a value. Around each of these there may be whitespace [p. 37] .
Because of the way selectors work, multiple declarations for the same selector
may be organized into semicolon (;) separated groups.
Example(s):
Thus, the following rules:
H1 { font-weight: bold }
H1 { font-size: 12pt }
H1 { line-height: 14pt }
H1 { font-family: Helvetica }
H1 { font-variant: normal }
H1 { font-style: normal }
are equivalent to:
H1 {
font-weight: bold;
font-size: 12pt;
line-height: 14pt;
font-family: Helvetica;
font-variant: normal;
font-style: normal
}
A property is an identifier [p. 38] . Any character may occur in the value, but
parentheses ("( )"), brackets ("[ ]"), braces ("{ }"), single quotes (’) and double
quotes (") must come in matching pairs, and semicolons not in strings must be
escaped [p. 38] . Parentheses, brackets, and braces may be nested. Inside the
quotes, characters are parsed as a string.
The syntax of values is specified separately for each property, but in any case,
values are built from identifiers, strings, numbers, lengths, percentages, URIs,
colors, angles, times, and frequencies.
A user agent must ignore [p. 42] a declaration with an invalid property name or
an invalid value. Every CSS2 property has its own syntactic and semantic restrictions
on the values it accepts.
Illegal example(s):
For example, assume a CSS2 parser encounters this style sheet:
H1 { color: red; font-style: 12pt } /* Invalid value: 12pt */
P { color: blue; font-vendor: any; /* Invalid prop.: font-vendor */
font-variant: small-caps }
EM EM { font-style: normal }
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