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

Example(s):
The following style sheet numbers nested list items as "1", "1.1", "1.1.1", etc.
OL { counter-reset: item }
LI { display: block }
LI:before { content: counters(item, "."); counter-increment: item }
12.5.2 Counter styles
By default, counters are formatted with decimal numbers, but all the styles available
for the ’list-style-type’ property are also available for counters. The notation
is:
counter(name)
for the default style, or:
counter(name, ’list-style-type’)
All the styles are allowed, including ’disc’, ’circle’, ’square’, and ’none’.
Example(s):
H1:before { content: counter(chno, upper-latin) ". " }
H2:before { content: counter(section, upper-roman) " - " }
BLOCKQUOTE:after { content: " [" counter(bq, hebrew) "]" }
DIV.note:before { content: counter(notecntr, disc) " " }
P:before { content: counter(p, none) }
12.5.3 Counters in elements with ’display: none’
An element that is not displayed (’display’ set to ’none’) cannot increment or reset
a counter.
Example(s):
For example, with the following style sheet, H2s with class "secret" do not
increment ’count2’.
H2.secret {counter-increment: count2; display: none}
Elements with ’visibility’ set to ’hidden’, on the other hand, do increment counters.
12.6 Markers and lists
Most block-level elements in CSS generate one principal block box. In this
section, we discuss two CSS mechanisms that cause an element to generate two
boxes: one principal [p. 97] block box (for the element’s content) and one separate
marker box (for decoration such as a bullet, image, or number). The marker
box may be positioned inside or outside the principal box. Unlike :before and
:after content, the marker box does not affect the position of the principal box,
whatever the positioning scheme.
The more general of the two mechanisms is new in CSS2 and is called
markers. The more limited mechanism involves the list [p. 168] properties of
CSS1. The list properties give authors quick results for many common ordered
and unordered list scenarios. However, markers give authors precise control over
marker content and position. Markers may be used with counters [p. 160] to
163