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<h2><span class="refentrytitle">nie:DataSource</span></h2>
<p>nie:DataSource</p>
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<div class="refsect1">
<a name="nie-DataSource.description"></a><h2>Description</h2>
<p>A superclass for all entities from which DataObjects can be extracted. Each entity represents a native application or some other system that manages information that may be of interest to the user of the Semantic Desktop. Subclasses may include FileSystems, Mailboxes, Calendars, websites etc. The exact choice of subclasses and their properties is considered application-specific. Each data extraction application is supposed to provide it's own DataSource ontology. Such an ontology should contain supported data source types coupled with properties necessary for the application to gain access to the data sources. (paths, urls, passwords etc...)</p>
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<a name="nie-DataSource.hierarchy"></a><h2>Class hierarchy</h2>
<pre class="screen"> <a class="link" href="rdfs-Resource.html" title="rdfs:Resource">rdfs:Resource</a>
╰── <span class="emphasis"><em><a class="link" href="nie-DataSource.html" title="nie:DataSource">nie:DataSource</a></em></span>
╰── tracker:Volume
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<div class="refsect1">
<a name="nie-DataSource.predefined-instances"></a><h2>Predefined instances</h2>
<p>nie:DataSource has the following predefined instances: </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>tracker:extractor-data-source</p></li></ul></div>
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<a name="nie-DataSource.see-also"></a><h2>See also</h2>
<p>The upstream documentation for the <a class="ulink" href="http://www.semanticdesktop.org/ontologies/2007/01/19/nie#" target="_top">NIE ontology</a>.</p>
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