The left and right columns are absolutly positioned and are a
fixed width.
The center column is flexible. It will automatically change
shape, width can be controlled by setting appropriate margins or
an actual width can be specified.
The layers overlap if the browser window is resized to a small
size so you need to specify the stacking order (z-index).
This template has been tested in:
Mozilla 1.5b & Firefox 0.8
Internet Explorer 6
Netscape 7.1
Opera 7.11
Changes in this version:
Defined zero for the body to fix a problem in Opera.
Filler Content
Dáig alta in mac sin i tig a athar & a mathar
icon airdig i m-Maig Muirthemne, ocus adfeta dó scéla na maccaemi
i n-Emain. Dáig is amlaid domeill Conchobar in rigi, o ro gab
rígi in rí, .i. mar atraig fóchetóir césta & cangni in
choicid d'ordugud. In lá do raind i trí asa athlil: cetna trian
de fóchetóir ic fegad na maccaem ic imbirt chless cluchi &
immanae, in trian tanaise dond ló ic imbirt brandub &
fidchell, & in trian dedenach ic tochathim bíd & lenna,
con-dageib cotlud for cách, aes cíuil & airfitid dia thalgud
fri sodain. Ciataim ane ar longais riam reme dabiur bréthir, ar
Fergus, na fuil in hErind no i n-Albain óclach macsamla
Conchobair.
Ocus adfeta don mac sin scéla na maceáem & na
maccraide i n-Emain, & radis in mac bec ria mathair ar co
n-digsed dá chluchi do chluchemaig na Emna. Romoch duitsiu sain a
meic bic, ar a mathair, co n-deoch anruth do anrothaib. Ulad lett
no choimthecht ecin do chaimthechtaib Conchobair, do chor th'
aesma & t'imdegla for in maccraid. Cían lim-sa di sodain a
mathair, ar in mac bec, & ni biu-sa oca idnaide acht
tecoisc-siu dam-sa cia airm itá Emain. Is cían uait, ar a
mathair, airm in-das-fil. Sliab Fúait etrut & Emain. Dobér-sa
ardmes furri amne, ar esium.
Right Column
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This is also why this chapter is largely (but not entirely) free of
browser warnings and caveats. Rather than drown the explanatory text
in side notes, we have chosen to simply describe positioning as it is
given by the CSS2 specification and leave things there. Perhaps the
second edition of this book will contain more practical advice, but
at this time, the only practical advice we can give is this: test
your positioning code thoroughly, and be prepared for inconsistencies
between positioning implementations.
There are nine distinct styles for theproperty border-style defined in CSS1, includingthe default value of none. They are demonstratedin Figure 7-29.
In the future, with publicly available DTDs that are standardized for each vertical industry, XML based app servers will become very popular. Also when XML schema repositories become available and widely used, app servers will be able to take on a new role and provide application services that are not offered now. Companies will need to share information with other companies in related fields, and each company might have a different software system in which all their data is housed. By agreeing upon a set of DTDs or schemas (encoded in XML), these companies can exchange information with each other regardless of what systems they are using to store this information. If their app servers can exchange XML documents (based on some shared DTD or schema), then these disparate app servers can understand each other and share information. One of the uses for XML foreseen by the W3C is just this, vertical industries (like insurance and health care) creating sets of DTDs and schemas that all companies in the industry agree upon. Then these companies' app servers can talk to each other using some popular protocol (like HTTP or CORBA/IIOP) to exchange information between each other. This has the potential to save a lot of time and money in the daily business operations of these companies.
Web-based Applications
Web-based applications are similar to app servers, except for one thing: Web-based applications don't have client apps, instead they use web browsers on the client side. They generate their front ends using HTML, which is dynamically generated by the web-based app. In the Java world, Servlets are best suited for this job.
font-weight: bold;}P {margin-left: 5em; position: relative;}<P> Lorem ipsum, dolor sit amet, consectetuer adipiscing elit,sed diam nonummy nibh euismod tincidunt ut <SPAN CLASS="change">***</SPAN>laoreet dolore magna aliquam erat volutpat.</P>
Figure 9-22. Another approach to defining a "change bar"
Remember when we mentioned static-position muchearlier in the chapter? Here's one example of how it works andhow it can be very useful.
The applications that you create with Java and XML will rely on the services provided by your Java XML Parser (using DOM or SAX). The information itself might be stored in a variety of persistence engines (object databases, relational databases, file systems, dynamic websites, etc.). The information however that comes out of these persistence storage engines must be converted to XML (if they are not in XML already). Once this is done, you have to be concerned with the material covered in this document. This document outlines the most popular Java XML application categories that are possible in an environment where data is encoded with XML, where web access is ubiquitous and platform independence is a necessity.
Java Application Layer
All of the code that you write (in your Java classes) might be considered the Java application layer. Other layers are the XML Parser layer, the XML source (that supplies the XML data that is necessary), and the persistence engine (where the data is actually stored and retrieved by the source).
Your code (in the Java application layer) has to make use of the DOM or SAX API and the XML parser in order to access the information in XML documents (that come from your source). The source might be responsible for pulling data from different persistence engines (relational or object databases) and even the web (dynamically generated websites that supply only XML data).
