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Properties</title>
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<h1>Apache POI - HPSF - Java API to Handle Microsoft Format Document
Properties</h1>
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<a name="Overview"></a>
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<h3>Overview</h3>
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<p>Microsoft applications like "Word", "Excel" or "Powerpoint" let the user
describe his 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 so-called <strong>property set
streams</strong>. A property set stream is a separate document within a
<a href="../poifs/index.html">POI filesystem</a>. We'll call property
set streams mostly just "property sets". 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>
<div id="authors" align="right">by Rainer Klute</div>
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