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

Example(s):
An example without quotes:
LI { list-style: url(http://www.redballs.com/redball.png) disc }
Parentheses, commas, whitespace characters, single quotes (’) and double
quotes (") appearing in a URI must be escaped with a backslash: ’\(’, ’\)’, ’\,’.
Depending on the type of URI, it might also be possible to write the above
characters as URI-escapes (where "(" = %28, ")" = %29, etc.) as described in
[URI].
In order to create modular style sheets that are not dependent on the absolute
location of a resource, authors may use relative URIs. Relative URIs (as defined
in [RFC1808]) are resolved to full URIs using a base URI. RFC 1808, section 3,
defines the normative algorithm for this process. For CSS style sheets, the base
URI is that of the style sheet, not that of the source document.
Example(s):
For example, suppose the following rule:
BODY { background: url("yellow") }
is located in a style sheet designated by the URI:
http://www.myorg.org/style/basic.css
The background of the source document’s BODY will be tiled with whatever
image is described by the resource designated by the URI
http://www.myorg.org/style/yellow
User agents may vary in how they handle URIs that designate unavailable or
inapplicable resources.
4.3.5 Counters
Counters are denoted by identifiers (see the ’counter-increment’ and
’counter-reset’ properties). To refer to the value of a counter, the notation
’counter()’ or ’counter(, )’ is used. The
default style is ’decimal’.
To refer to a sequence of nested counters of the same name, the notation is
’counters(, )’ or ’counters(, ,
)’. See "Nested counters and scope" [p. 162] in the chapter on
generated content [p. 153] .
In CSS2, the values of counters can only be referred to from the ’content’ property.
Note that ’none’ is a possible : ’counter(x, none)’ yields an
empty string.
Example(s):
Here is a style sheet that numbers paragraphs (P) for each chapter (H1). The
paragraphs are numbered with roman numerals, followed by a period and a
space:
P {counter-increment: par-num}
H1 {counter-reset: par-num}
P:before {content: counter(par-num, upper-roman) ". "}
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