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<html>
<head>
<META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title></title>
</head>
<body bgcolor="#ffffff" marginheight="4" marginwidth="4" leftmargin="4" topmargin="4" alink="#023264" vlink="#023264" link="#525D76" text="#000000">
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top"><a href="http://jakarta.apache.org/index.html"><img src="images/jakarta-logo.gif" border="0" vspace="0" hspace="0"></a></td><td bgcolor="#ffffff" align="left" valign="top" width="100%"><img src="images/header.gif" align="right" border="0" vspace="0" hspace="0"></td>
</tr>
<tr>
<td colspan="2" height="2" width="100%">
<hr size="1" noshade="">
</td>
</tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td valign="top" width="1%"></td><td nowrap="1" valign="top" width="14%">
<br>
<font face="arial,helvetica,sanserif">
<br>
<font size="+1" color="#000000">Main</font><font size="-1">
<ul>
<li>
<a href="http://jakarta.apache.org"><font size="-1">Jakarta</font></a>
</li>
</ul>
</font>
<br>
<font size="+1" color="#000000">About</font><font size="-1">
<ul>
<li>
<a href="index.html"><font size="-1">Index</font></a>
</li>
<li>
<a href="historyandfuture.html"><font size="-1">History</font></a>
</li>
<li>
<a href="historyandfuture.html"><font size="-1">Future</font></a>
</li>
<li>
<a href="http://sourceforge.net/project/showfiles.php?group_id=32701"><font size="-1">Download</font></a>
</li>
<li>
<a href="plan/POI10Vision.html"><font size="-1">1.0 Vision</font></a>
</li>
<li>
<a href="plan/POI20Vision.html"><font size="-1">2.0 Vision</font></a>
</li>
<li>
<a href="who.html"><font size="-1">Who we are</font></a>
</li>
<li>
<a href="changes.html"><font size="-1">Changes</font></a>
</li>
<li>
<a href="todo.html"><font size="-1">Todo</font></a>
</li>
</ul>
</font>
<br>
<font size="+1" color="#000000">Sub-Projects</font><font size="-1">
<ul>
<li>
<a href="overview.html"><font size="-1">Overview</font></a>
</li>
<li>
<a href="poifs/index.html"><font size="-1">POIFS</font></a>
</li>
<li>
<a href="hssf/index.html"><font size="-1">HSSF</font></a>
</li>
<li>
<a href="hdf/index.html"><font size="-1">HDF</font></a>
</li>
<li>
<a href="hpsf/index.html"><font size="-1">HPSF</font></a>
</li>
<li>
<a href="utils/index.html"><font size="-1">POI-Utils</font></a>
</li>
</ul>
</font>
<br>
<font size="+1" color="#000000">References</font><font size="-1">
<ul>
<li>
<a href="livesites.html"><font size="-1">Live Sites</font></a>
</li>
<li>
<a href="building.xml"><font size="-1">Building</font></a>
</li>
<li>
<a href="http://sc.openoffice.org/excelfileformat.pdf"><font size="-1">XLS spec [PDF]</font></a>
</li>
<li>
<a href="http://xml.apache.org/cocoon/"><font size="-1">Apache Cocoon</font></a>
</li>
</ul>
</font>
<br>
<font size="+1" color="#000000">Get Involved</font><font size="-1">
<ul>
<li>
<a href="contrib.html"><font size="-1">Contributing</font></a>
</li>
<li>
<a href="http://nagoya.apache.org/bugzilla/buglist.cgi?product=POI"><font size="-1">Bug Database</font></a>
</li>
<li>
<a href="http://jakarta.apache.org/site/cvsindex.html"><font size="-1">CVS</font></a>
</li>
<li>
<a href="http://jakarta.apache.org/site/mail.html"><font size="-1">Mail Lists</font></a>
</li>
</ul>
</font>
<br>
<br>
</font></td><td align="left" valign="top" width="*"><font size="-2" color="#000000">
<p>
<a href="mailto:"></a>
</p>
</font>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="100%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+1"><font face="Arial,sans-serif"><b>Logo Contest</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">
The POI committers have voted to
<a href="http://jakarta.apache.org/ant">"innovate"</a> and hold a
logo contest. The big P at the top of the page is just a placeholder.
So the rules are pretty much this:
</p>
<ul>
<li>
<a href="http://burnallgifs.org/">Only PNG submissions</a>
be accepted (we can convert them as needed).
</li>
<li>
Submissions must be sent to the <a href="http://jakarta.apache.org/site/mail.html">POI
User's mailing list</a> via an http link. If you do not
have an available webserver contact Andy (acoliver at apache dot
org) and ask him to post it for you (and he will if it doesn't
suck royally). Large binary attachments annoyingly posted to
the list will be rebuked. :-)
</li>
<li>
Image authors must be willing to work with us on any font and
sizing issues, etc.
</li>
<li>
All submissions become property of the Apache Software
Foundation to do whatever it wants with them (thanks!).
</li>
<li>
A non-binding poll will be taken and everyone can vote.
</li>
<li>
Based on the poll results and the fact that Andy won't vote for
anything that isn't some kind of tiki god or hawaiian theme
(maybe a poi pounder would be acceptable), the committers will
vote on the new POI logo.
</li>
<li>
Logos should be submitted in two flavors: one for the top of the
page and another for posting on other sites that note projects
that use POI technology.
</li>
<li>
The winner will get credit posted somewhere on the POI site and
have their logo used wherever POI is proudly served.
</li>
</ul>
</td>
</tr>
</table>
</div>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="100%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+1"><font face="Arial,sans-serif"><b>Purpose</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">
The POI project consists of APIs for manipulating various file formats
based upon Microsoft's OLE 2 Compound Document format using pure Java.
</p>
<p align="justify">
OLE 2 Compound Document Format based files include most Microsoft Office
files such as XLS and DOC.
</p>
<p align="justify">
As a general policy we try to collaborate as much as possible with other projects to
provide this functionality. Examples include: <a href="http://xml.apache.org/cocoon">Cocoon</a> for
which you'll soon find generators and serializers for our projects;
<a href="http://www.openoffice.org">Open Office.org</a> with whom we collaborate in documenting the
XLS format; and <a href="http://jakarta.apache.org/lucene">Lucene</a> for which we'll soon have file
format interpretors. When practical, we donate components directly to those projects for POI-enabling them.
</p>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="99%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Why/when would I use POI?</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">
We'll tackle this on a component level. POI refers to the whole project.
</p>
<p align="justify">
So why should you use POIFS or HSSF?
</p>
<p align="justify">
You'd use POIFS if you had a document written in OLE 2 Compound Document Format, probably written using
MFC, that you needed to read in Java. Alternatively, you'd use POI to write OLE 2 Compound Document Format
if you needed to inter-operate with software running on the Windows platform. We are not just bragging when
we say that POIFS is the most complete and correct port of this file format to date!
</p>
<p align="justify">
You'd use HSSF if you needed to read or write an XLS (Excel) file using Java. You can also read and modify
spreadsheets using this API, although right now writing is more mature.
</p>
</td>
</tr>
</table>
</div>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="99%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>What does POI stand for?</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">
POI stands for Poor Obfuscation Implementation. Why would we name our project such a derogatory name? Well,
Microsoft's OLE 2 Compound Document Format is a poorly conceived thing. It is essentially an archive structured
much like the old DOS FAT filesystem. Redmond chose, instead of using tar, gzip, zip or arc, to invent their own
archive format that does not provide any standard encryption or compression, is not very appendable and is prone
to fragmentation.
</p>
<p align="justify">
Poi is also a Hawaiian delicacy that <a href="http://www.m-w.com">Merriam Webster's dictionary</a> defines as:
"A Hawaiian food of taro root cooked, pounded, and kneaded to a paste and often allowed to ferment." This seemed
strangely descriptive of the file format.
</p>
<p align="justify">
So if you like acronyms, then POI is an acronym. If you hate them, then we just used the name of the food for our
project. If you wish to signify your love or hate for acronyms, use POI or Poi to refer to the project respectively.
</p>
</td>
</tr>
</table>
</div>
<br>
</td>
</tr>
</table>
</div>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="100%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+1"><font face="Arial,sans-serif"><b>Components To Date</b></font></font></td>
</tr>
<tr>
<td>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="99%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>Overview</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">A common misconception is that POI writes Excel files. POI is the name of the project. POI contains several
components, one of which, HSSF, writes Excel files. The following are components of the entire POI project
and a brief summary of their purpose.</p>
</td>
</tr>
</table>
</div>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="99%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>POIFS (POI Filesystem)</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">POIFS is the oldest and most stable part of the project. It is our port of the OLE 2 Compound Document Format to
pure Java. It supports both read and write functionality. All of our components ultimately rely on it by
definition. Please see <a href="poifs/index.html">the POIFS project page</a> for more information.</p>
</td>
</tr>
</table>
</div>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="99%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>HSSF (Horrible Spreadsheet Format)</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">HSSF is our port of the Microsoft Excel 97(-2002) file format (BIFF8) to pure Java. It supports read and write
capability. Please see <a href="hssf/index.html">the HSSF project page</a> for more information.</p>
</td>
</tr>
</table>
</div>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="99%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>HDF (Horrible Document Format)</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">HDF is our port of the Microsoft Word 97 file format to pure Java. It supports read and write capability.
Please see <a href="hdf/index.html">the HDF project page for more information</a>. This component is
in the early stages of design. Jump in!</p>
</td>
</tr>
</table>
</div>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="99%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+0"><font face="Arial,sans-serif"><b>HPSF (Horrible Property Set Format)</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">HPSF is our port of the OLE 2 property set format to pure
Java. Property sets are mostly use to store a document's properties
(title, author, date of last modification etc.), but they can be used
for application-specific purposes as well. Currently HPSF supports
read functionality only. Please see <a href="hpsf/index.html">the HPSF project page</a> for more
information.</p>
</td>
</tr>
</table>
</div>
<br>
</td>
</tr>
</table>
</div>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="100%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+1"><font face="Arial,sans-serif"><b>What happened to the HSSF Serializer?</b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">The HSSF Serializer, which was part of our 1.0 release and last builds on
<a href="http://www.sourceforge.net/projects/poi">Sourceforge</a>, has been donated to the Cocoon project. We're
currently in the process of porting it over.</p>
</td>
</tr>
</table>
</div>
<br>
<div align="right">
<table cellspacing="0" cellpadding="2" border="0" width="100%">
<tr>
<td bgcolor="#525D76"><font color="#ffffff" size="+1"><font face="Arial,sans-serif"><b>Contributing </b></font></font></td>
</tr>
<tr>
<td>
<br>
<p align="justify">
So you'd like to contribute to the project? Great! We need enthusiastic, hard-working, talented folks to help
us on the project in several areas. The first is bug reports and feature requests! The second is documentation -
we'll be at your every beck and call if you've got a critique or you'd like to contribute or otherwise improve
the documentation. We could especially use some help documenting the HSSF file format! Last, but not least, we
could use some binary crunching Java coders to chew through the convolution that characterizes Microsoft's file
formats and help us port new ones to a superior Java platform!
</p>
<p align="justify">So if you're motivated, ready, and have the time, join the mail lists and we'll be happy to help you get started on the
project!
</p>
</td>
</tr>
</table>
</div>
<br>
</td>
</tr>
</table>
<br>
<table cellpadding="0" cellspacing="0" border="0" width="100%">
<tr>
<td>
<hr size="1" noshade="">
</td>
</tr>
<tr>
<td align="center"><font color="#525D76" size="-1" face="arial,helvetica,sanserif"><i>
Copyright ©2002 Apache Software Foundation
</i></font></td><td width="5%" align="right"><img src="images/cocoon2-small.jpg" align="right" border="0" vspace="0" hspace="0"></td>
</tr>
</table>
</body>
</html>
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