64 lines
2.5 KiB
HTML
64 lines
2.5 KiB
HTML
<!doctype html public "-//W3C//DTD HTML 4.0//EN//">
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<!-- Copyright (C) 2004 The Apache Software Foundation. All rights reserved. -->
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<html>
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<head>
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<title></title>
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</head>
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<body>
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<div>
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<p>The <strong>POI Browser</strong> is a very simple Swing GUI tool that
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displays the internal structure of a Microsoft Office file. It concentrates
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on streams in the <em>Horrible Property Set Format (HPSF)</em>. In order to
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access these streams the POI Browser uses the package
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<tt>org.apache.poi.hpsf</tt>.</p>
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<p>A file in Microsoft's Office format can be seen as a filesystem within a
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file. For example, a Word document like <var>sample.doc</var> is just a
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simple file from the operation system's point of view. However, internally
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it is organized into various directories and files. For example,
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<var>sample.doc</var> might consist of the three internal files (or
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"streams", as Microsoft calls them) <tt>\001CompObj</tt>,
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<tt>\005SummaryInformation</tt>, and <tt>WordDocument</tt>. (In these names
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\001 and \005 denote the unprintable characters with the character codes 1
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and 5, respectively.) A more complicated Word file typically contains a
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directory named <tt>ObjectPool</tt> with more directories and files nested
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within it.</p>
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<p>The POI Browser makes these internal structures visible. It takes one or
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more Microsoft files as input on the command line and shows directories and
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files in a tree-like structure. On the top-level POI Browser displays the
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(operating system) filenames. An internal file (i.e. a "stream" or a
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"document") is shown with its name, its size and a hexadecimal dump of its
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first bytes.</p>
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<p>The POI Browser pays special attention to property set streams. For
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example, the <tt>\005SummaryInformation</tt> stream contains information
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like title and author of the document. The POI Browser opens every stream
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in a POI filesystem. If it encounters a property set stream, it displays
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not just its first bytes but analyses the whole stream and displays its
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contents in a more or less readable manner.</p>
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</div>
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</body>
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</html>
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<!-- Keep this comment at the end of the file
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Local variables:
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sgml-default-dtd-file:"HTML_4.0_Strict.ced"
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mode: html
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sgml-omittag:t
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sgml-shorttag:nil
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sgml-namecase-general:t
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sgml-general-insert-case:lower
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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sgml-parent-document:nil
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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-->
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