Book HomeCascading Style Sheets: The Definitive GuideSearch this book Sunday 23rd of November 2014 05:43:51 PM

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.

I will take a break from my normal pragmatic approach to getting you (the programmer) started with using XML and Java and just talk about the high level (design level) benefits of this wonderful combination. A good design is important to a good implementation for any system.

XML is structured

When you create your data using an XML editor (that you can write), you can not only input the content of your data, but also define the structural relationships that exist inside your data. By allowing you to define your own tags and create the proper structural relationships in your information (with a DTD), you can use any XML parser to check the validity and integrity of the data stored in your XML documents. This makes it very easy to validate the structure and content of your information when you use XML. Without XML, you could also provide this validation feature at the expense of developing the code to this yourself. XML is a great time saver because most of the features that are available in XML are used by most programmers when working on most projects.

By using XML and Java, you can quickly create and use information that is properly structured and valid. By using (or creating) DTDs and storing your information in XML documents, you have a cross-platform and language independent data validation mechanism (for free) in all your projects!

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 


Library Navigation Links

Copyright © 2002 O'Reilly & Associates. All rights reserved.

XML parsers allow you to code faster by giving you a parser for your all your XML documents (with and without DTDs).

XML documents are easily committed to a persistence layer

XML documents may be stored in files or databases. When stored in files, XML documents are simply plain text files with tags (and possibly DTDs). It is very easy to save your XML documents to a text file and pass the text file around to other machines, platforms and programs (as long as they can understand the data). In the worst case scenario, XML documents (files) can be viewed in a text editor on just about any platform.

XML documents are also naturally committed to a database (relational or object) or any other kind of XML document store. There are commercial products available which allow you to save XML documents to an XML storage layer (which is not a database per se), like Datachannel's XStore and ODI's eXcelon. These XML store solutions are quite expensive ($10,000 to $20,000 range).

browser may vary.

In the case of ordered lists, CSS2 goes a great dealfurther than CSS1 to provide control over the ordering. For example,there is no way in CSS1 to automatically create subsection counterssuch as "2.1" or "7.1.3." This can, however,be done under CSS2 and is briefly discussed in Chapter 10, "CSS2: A Look Ahead".

Values

block | inline | list-item | none

Default

block

Inherited

no

Applies to

all elements