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====================================================================
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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<!DOCTYPE document PUBLIC "-//APACHE//DTD Documentation V2.0//EN" "document-v20.dtd">
<document>
<header>
<title>Apache POI™ - HPSF - Java API for Microsoft Format Document
Properties</title>
<subtitle>Overview</subtitle>
<authors>
<person name="Rainer Klute" email="klute@apache.org"/>
</authors>
</header>
<body>
<section><title>Overview</title>
<p>Microsoft applications like "Word", "Excel" or "Powerpoint" let the user
describe a document by properties like "title", "category" and so on. The
application itself adds further information: last author, creation date
etc. These document properties are stored in <strong>property set
streams</strong>. A property set stream is a separate document within a
<a href="../poifs/index.html">POI filesystem</a>. HPSF is POI's pure-Java
implementation to read and write property sets.</p>
<p>The <a href="how-to.html">HPSF HOWTO</a> describes what a Java
application should do to read a property set using HPSF, how to retrieve
the information it needs, and how to write properties into the
document.</p>
<p>HPSF supports OLE2 property set streams in general, and is not limited to
the special case of document properties in the Microsoft Office files
mentioned above. The <a href="internals.html">HPSF description</a>
describes the internal structure of property set streams. A separate
document explains the internal of <a href="thumbnails.html">thumbnail
images</a>.</p>
</section>
</body>
</document>
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