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7.4 Nesting Lists
Except
inside directories or menus, lists nested inside other lists are
fine. Menu and directory lists can be embedded within other lists.
Indents for each nested list are cumulative, so do not nest lists too
deeply; the list contents could quickly turn into a thin ribbon of
text flush against the right edge of the browser document window.
7.4.1 Nested Unordered Lists
The
items in each nested unordered list may be preceded by a different
bullet character at the discretion of the browser. For example,
Internet Explorer Version 2 for Macintosh used an alternating series
of hollow, solid circular, and square bullets for the various nests
in the following source fragment, as shown in Figure 7-6 (other browsers to date
haven't been as inventive):
<ul>
<li>Morning Kumquat Delicacies</li>
<ul>
<li>Hot Dishes</li>
<ul>
<li>Kumquat omelet</li>
<li>Kumquat waffles</li>
<ul>
<li>Country style</li>
<li>Belgian</li>
</ul>
<li>Kumquats and toast</li>
</ul>
<li>Cold Dishes</li>
<ul>
<li>Kumquats and cornflakes</li>
<li>Pickled Kumquats</li>
<li>Diced Kumquats</li>
</ul>
</ul>
</ul>
Figure 7-6. Bullets change for nested unordered list items
You can change the bullet style for each unordered list and even for
individual list items (see the type attribute
discussion in Section 7.3.1.1), but the
repertoire of bullets is limited. For example, Internet Explorer 6
for Windows and Netscape render a solid disc for level-one items, an
open circle for level two, and a solid square for subsequent levels.
7.4.2 Nested Ordered Lists
By default,
browsers number the items in ordered lists beginning with the Arabic
numeral 1, nested or not. It would be great if the standards numbered
nested ordered lists in some rational, consecutive manner. For
example, the items in the second nest of the third main ordered list
might be successively numbered
"3.2.1,"
"3.2.2,"
"3.2.3," and so on.
With the type and value
attributes, however, you do have a lot more latitude in how you
create nested ordered lists. An excellent example is the traditional
style for outlining, which uses the many different ways of numbering
items offered by the type attribute (see Figure 7-7):
<ol type="A">
<li>A History of Kumquats</li>
<ol type="1">
<li>Early History</li>
<ol type="a">
<li>The Fossil Record</li>
<li>Kumquats: The Missing Link?</li>
</ol>
<li>Mayan Use of Kumquats</li>
<li>Kumquats in the New World</li>
</ol>
<li>Future Use of Kumquats</li>
</ol>
Figure 7-7. The type attribute lets you do traditional outlining with ordered lists
