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<!--Table of Child-Links-->

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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>

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<UL CLASS="ChildLinks">

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<LI><A NAME="tex2html318"

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  HREF="node2.html#SECTION00210000000000000000">Welcome to I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> !</A>

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<LI><A NAME="tex2html319"

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  HREF="node2.html#SECTION00220000000000000000">The Features</A>

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<LI><A NAME="tex2html320"

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  HREF="node2.html#SECTION00230000000000000000">The Development</A>

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<LI><A NAME="tex2html321"

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  HREF="node2.html#SECTION00240000000000000000">3rd party code used in I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> </A>

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</UL>

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<HR>

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<H1><A NAME="SECTION00200000000000000000">

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Introduction</A>

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</H1>

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<P>

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<H1><A NAME="SECTION00210000000000000000">

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Welcome to I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> !</A>

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</H1>

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<P>

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<!-- MATH

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<SPAN CLASS="MATH"><IMG

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 WIDTH="269" HEIGHT="726" ALIGN="MIDDLE" BORDER="0"

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 SRC="img1.png"

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 ALT="\fbox{\includegraphics[scale=0.5]{img/lang-sel-splash}}"></SPAN>

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I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> is a tool that will help you to solve your software installation

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problems. It is a Java<SUP><SMALL>TM</SMALL></SUP> based software installer builder that will run

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on any operating system coming with a <SPAN  CLASS="textit">Java Virtual Machine

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(JVM)</SPAN> that is compliant with the Sun JVM 1.2 or higher. Its design is

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very modular and you will be able to choose how <SPAN  CLASS="textbf">you</SPAN> want your

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installer to look and you will also be able to customize it using a very

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simple <SPAN  CLASS="textit">Application Programming Interface (API)</SPAN>. Although

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I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> is essentially a Java<SUP><SMALL>TM</SMALL></SUP> only application (it can run on virtually

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any operating system), it can interact in a clean way with the

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underlying operating system. Native code can interact with it on a

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specific platform without disturbing the operation on incompatible

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operating systems. For instance, you can develop Unix-specific code that

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will be silent if run on Windows. To put it in a nutshell, whereas most

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of the other Java<SUP><SMALL>TM</SMALL></SUP> installers force you to go their way, I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> will

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let you go <SPAN  CLASS="textbf">your way</SPAN>. Some respectable companies have been using

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it in order to produce customized  installers for their <SPAN  CLASS="textsl">very</SPAN>

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specific needs.

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<BR>

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<P>

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<SPAN  CLASS="textit">"So, if it's so good, how much is it ?"</SPAN> : well, you can get it

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for free. <SPAN  CLASS="textbf">BUT</SPAN> I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> is not a <SPAN  CLASS="textit">freeware</SPAN>. It's not

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<SPAN  CLASS="textit">free</SPAN> as in <SPAN  CLASS="textit">"free beer"</SPAN> but <SPAN  CLASS="textit">"free as in free

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speech"</SPAN>. So it's neither <SPAN  CLASS="textit">freeware</SPAN> nor <SPAN  CLASS="textit">public domain</SPAN>.

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It is software covered by the GNU G<SMALL>ENERAL </SMALL>P<SMALL>UBLIC </SMALL>L<SMALL>ICENSE</SMALL> (GPL).

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It uses the tactic of <SPAN  CLASS="textit">copyleft</SPAN> : to make it short, you can use

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it, modify it and redistribute it freely but you must also make your

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modifications available to everyone whenever you publish a modified

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version of a <SPAN  CLASS="textit">copylefted</SPAN> software. You have access to the

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I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> source code and you can modify it to make it suit your needs,

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but if you publish such a modified version, you are forced to publish

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the modifications you've made. <SPAN ID="txt133">That's a fair exchange of

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expertise and  work</SPAN>. To learn more about the GPL license and the

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<SPAN  CLASS="textit">copyleft</SPAN> principles, visit <TT><A NAME="tex2html7"

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  HREF="http://www.gnu.org/">http://www.gnu.org/</A></TT>.

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<BR>

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<P>

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<H1><A NAME="SECTION00220000000000000000">

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The Features</A>

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</H1>

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<P>

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I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> uses XML files to describe installations. When you make an

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installer, you have a choice of panels. You can see panels as a kind of

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plugin that composes the installer. For instance, a panel can choose the

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installation path, the packs to install, prompt the user for a license

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agreement and so on. This approach is very modular. You can also create

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your own panels if you have specific needs. In some cases you even have

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a choice from multiple panel versions for the same task. You can also

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choose the order in which panels appear during the installation process.

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I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> can be used in a number of different ways:

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<UL>

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<LI>by writing the XML installation file "by hand" and compiling

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  it with the command line compiler

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</LI>

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<LI>by invoking the compiler from the great A<SMALL>PACHE </SMALL>J<SMALL>AKARTA

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  </SMALL>A<SMALL>NT</SMALL> tool (see <TT><A NAME="tex2html8"

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  HREF="http://jakarta.apache.org/">http://jakarta.apache.org/</A></TT>) as I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> can be

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  used as a task for A<SMALL>NT</SMALL>

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</LI>

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</UL>

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<P>

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Here is a brief (and certainly incomplete !) list of the main I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> features :

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<UL>

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<LI>XML based installation files

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</LI>

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<LI>easy internationalization using XML files (10 translations are already

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  available)

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</LI>

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<LI>Ant integration, command-line compiler

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</LI>

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<LI>easy customization with the panels and a rich API (even an XML parser is

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  included !)

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</LI>

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<LI>powerful variable substitution system that you can use to customize

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  scripts and more generally any text-based file

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</LI>

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<LI>different kinds of installers (standard, web-based, ...)

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</LI>

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<LI>launching of external executables during the installation process and Unix

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  executable flag support (useful for the scripts for instance)

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</LI>

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<LI>layout of the installation files in packs (some can be optional)

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</LI>

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<LI>native code integration facilities

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</LI>

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<LI>jar files nesting support

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</LI>

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<LI>... <SPAN  CLASS="textsl">more things to discover and create !</SPAN>.

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</LI>

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</UL>

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<P>

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<H1><A NAME="SECTION00230000000000000000">

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The Development</A>

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</H1>

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<P>

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I started writing I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> in April 2001 and many people have helped me

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improving it since. I prefer not to mention them here as I would for sure forget

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some of them, so please check the file named <TT>Thanks.txt</TT> which I try to

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get as up-to-date as possible in order to mention everyone who helped me. As far

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as I'm concerned, I'm a french student and I rather see this as a fun activity

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in my free time where I can learn a lot of great things. The contributors to the

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project are both individuals and companies. Help can take any form :

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<UL>

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<LI>translations

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</LI>

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<LI>new features and various fixes

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</LI>

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<LI>bug fixes

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</LI>

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<LI>writing manuals

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</LI>

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<LI>... anything else you like :-)

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</LI>

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</UL>

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<P>

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The official I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> homepage is located at

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<TT><A NAME="tex2html9"

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  HREF="http://www.izforge.com/izpack/">http://www.izforge.com/izpack/</A></TT>. The IzPack developer services

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(mailing-lists, CVS, patches manager, bugs tracker, ...) are generously hosted

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by BerliOS. The IzPack BerliOS section is located at

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<TT><A NAME="tex2html10"

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  HREF="http://developer.berlios.de/projects/izpack/">http://developer.berlios.de/projects/izpack/</A></TT>. Feel free to

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use these services. In particular, there are two mailing-lists:

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<UL>

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<LI><TT>izpack-devel</TT>: used for the IzPack development

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</LI>

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<LI><TT>izpack-users</TT>: general users lounge, great to get some help with

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IzPack.

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</LI>

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</UL>

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<P>

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<H1><A NAME="SECTION00240000000000000000">

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3rd party code used in I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> </A>

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</H1>

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<P>

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I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> uses several 3rd party libraries and I would like to mention them in

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respect for their respective authors work :

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<UL>

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<LI><SPAN  CLASS="textit">NanoXML</SPAN> by Marc D<SMALL>E </SMALL>S<SMALL>CHEEMAECKER</SMALL> : the XML parser used

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  inside I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> and released under a <SPAN  CLASS="textit">zlib/png</SPAN>-style license - see

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<BR>  <TT><A NAME="tex2html11"

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  HREF="http://nanoxml.sourceforge.net/">http://nanoxml.sourceforge.net/</A></TT> -

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</LI>

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<LI><SPAN  CLASS="textit">Kunststoff Look and Feel</SPAN> by Incors Gmbh : a Swing<SUP><SMALL>TM</SMALL></SUP>

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   Look and Feel

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  that can be used for installers. It <SPAN  CLASS="textbf">really</SPAN> looks good and

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  is released under the GNU L<SMALL>ESSER </SMALL>G<SMALL>ENERAL </SMALL>P<SMALL>UBLIC </SMALL>L<SMALL>ICENSE (</SMALL>LGPL) - see

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  <TT><A NAME="tex2html12"

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  HREF="http://www.incors.org/">http://www.incors.org/</A></TT> -

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</LI>

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<LI><SPAN  CLASS="textit">Crystal-SVG Icons</SPAN> : the icons used in I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> come from

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  the great work of Everaldo (<TT><A NAME="tex2html13"

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  HREF="http://www.everaldo.com/">http://www.everaldo.com/</A></TT>) that makes KDE 3.2

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  look so sweet

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</LI>

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<LI><SPAN  CLASS="textit">Some Apache Jakarta classes and libraries</SPAN> : released under the

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  <SPAN  CLASS="textit">Apache License</SPAN>

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</LI>

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<LI><SPAN  CLASS="textit">Metouia Look and Feel</SPAN> by Taoufik Romdhane : released under the

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  <SPAN  CLASS="textit">LGPL license</SPAN> - see <TT><A NAME="tex2html14"

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  HREF="http://mlf.sf.net/">http://mlf.sf.net/</A></TT>

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</LI>

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<LI><SPAN  CLASS="textit">Liquid Look and Feel</SPAN> by Miroslav Lazarevic : released under the

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  <SPAN  CLASS="textit">LGPL license</SPAN> - see <TT><A NAME="tex2html15"

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  HREF="liquidlnf.sf.net/">liquidlnf.sf.net/</A></TT>

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</LI>

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<LI><SPAN  CLASS="textit">JGoodies Looks</SPAN> by Karsten Lentzsch : released under a

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  <SPAN  CLASS="textit">BSD-style license</SPAN> - see <TT><A NAME="tex2html16"

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  HREF="http://looks.dev.java.net/">http://looks.dev.java.net/</A></TT>.

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</LI>

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</UL>

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<P>

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So, now let's dive into understanding how I<SMALL>Z</SMALL>P<SMALL>ACK</SMALL> works. You'll be

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surprised to see how powerful and simple it can be :-)

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<ADDRESS>

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Julien Ponge

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2005-04-22

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</ADDRESS>

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