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10.9. Summary

CSS2 obviously covers a lot of ground, and exploring it in detail would probably have added at least four more chapters to this book, not to mention dramatically bulking up some of the chapters that already exist. However, since so little of CSS2 has actually been implemented at this writing, we felt it was better to provide an overview that was light on details. After all, the specification may change as implementations reveal flaws, and we'd rather stick to describing things that are fairly reliable.

For quick reference purposes, Table 10-1 gives a quick summary of everything new in CSS2.

Table 10-1. New Properties in CSS2

New Properties in CSS2

text-shadow
font-size-
adjust
font-stretch
unicode-bidi
cursor
outline
outline-color
outline-style
outline-width
content
quotes
counter-reset
counter-increment
marker-offset
border-top-color
border-right-color
border-bottom-color
border-left-color
border-top-style
border-right-style
border-bottom-style
border-left-style
position
direction
top
right
bottom
left
z-index
min-width
max-width
min-height
max-height
overflow
clip
visibility
page-break-before
page-break-after
page-break-inside
orphans
widows
size
marks
border-collapse
border-spacing
table-layout
border-spacing
empty-cells
caption-side
speak-header-cell
volume
speak
pause-before
pause-after
pause
cue-before
cue-after
cue
play-during
azimuth
elevation
speech-rate
voice-family
pitch
pitch-range
stress
richness
speak-punctuation
speak-rate
speak-numeral
speak-time

New Pseudo-Classes and Pseudo-Elements in CSS2

:hover
:left
:right
:first
:before
:after

New @-rules in CSS2

@media
@font-face
@page

Table 10-2. New Values in CSS2

All Properties

inherit

The display Property

run-in
compact
marker
table
inline-table
table-row-group
table-column-group
table-header-group
table-footer-group
table-row
table-cell
table-caption 

The font Property

caption
icon
menu
message-box
small-caption
status-bar

The list-style-type Property

decimal-leading-zero
hebrew
georgian
armenian
cjk-ideographic
hiragana
katakana
hiragana-iroha
katakana-iroha
lower-greek

The color values

active-border
active-caption
app-workspace
background
button-face
button-highlight
button-text
caption-text
gray-text
highlight
highlight-text
inactive-border
inactive-caption
info-background
info-text
menu
menu-text
scrollbar
three-d-dark-shadow
three-d-face
three-d-highlight
three-d-lightshadow
three-d-shadow
window
window-frame
window-text

The vertical-align Property

length 

font-weight, but they can correspond to common variant names. If there is a font variant labeled something such as "Normal," "Regular," "Roman," or "Book," then it is assigned to the number 400 and any variant with the label "Medium" is assigned to 500. However, if a variant labeled "Medium" is the only variant available, it is not assigned to 500.


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cases where you want the browser to go ahead and automaticallycalculate the width, or the height, or both.

9.1.3.1. Setting width and height

If you want to give your positioned element a specific width, thenthe obvious property to turn to iswidth. Similarly,height will let you declare a specific heightfor a positioned element.good way to let you set colors is to give you direct access to thosecolor levels, thereby determining your own mixture of the beams. Thismethod is a bit more complex, obviously, but the payoffs are worth itbecause you aren't limited to whichever colors have been named.

3.1.2.1. Percentage colors

There are, in fact, four ways to affectRGB color. The first way we'll examine is perhaps the easiest

XML is an open standard

By making the W3C the keeper of the XML standard, it ensures that no one vendor should be able to cause interoperability problems to occur between systems that use the open standard. This should be reassuring to most companies making an investment in this technology, by being vendor neutral, this solution proposes to keep even small companies out of reach of big companies choosing to change the standards on them. For example, if a big company chooses to change the platform at its whim, then most other companies relying on that platform suffer. By keeping all data in XML and using XML in communications protocols, companies can maximize the lifetime of their investment in their products and solutions.

XML is language independent

By being language independent, XML bypasses the requirement to have a standard binary encoding or storage format. Language independence also fosters immense interoperability amongst heterogeneous systems. It is also good for future compatilbilty. For example, if in the future a product needs to be changed in order to deal with a new computing paradigm or network protocol, by keeping XML flowing through the system, addition of a new layer to deal with this change is feasible.

complicated. The advantage is that with these methods, you canspecify any color in the 8-bit color spectrum, not just sixteen (orhowever many) named colors. This is accomplished by taking advantageof the way colors are generated by computers.

3.1.2. Colors by RGB

Computers