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KDE 4.4 PyKDE API Reference
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<h1>Property Class Reference</h1>
<code>from PyKDE4.nepomuk import *</code>
<p>
Inherits: Nepomuk.Types.Entity<br />
Namespace: Nepomuk.Types.Property<br />
<h2>Detailed Description</h2>
<p>\class Property property.h Nepomuk/Types/Property
</p>
<p>
A property is a resource of type rdf:Property which relates a domain
with a range. The latter one can be a Literal or a Class.
</p>
<p>
Property instances are explicitly shared. Two instances created
with the same uri reference the same data.
</p>
<p>
While Resource objects can be changed Property instances are considered
to be static and never changed during their lifetime.
</p>
<p>
<dl class="author" compact><dt><b>Author:</b></dt><dd> Sebastian Trueg <trueg@kde.org> </dd></dl>
</p>
<table border="0" cellpadding="0" cellspacing="0"><tr><td colspan="2"><br><h2>Methods</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#Property">__init__</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#Property">__init__</a> (self, <a href="http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qurl.html">QUrl</a> uri)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#Property">__init__</a> (self, <a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a> a0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#cardinality">cardinality</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../nepomuk/Nepomuk.Types.Class.html">Nepomuk.Types.Class</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#domain">domain</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#inverseProperty">inverseProperty</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#isParentOf">isParentOf</a> (self, <a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a> other)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#isSubPropertyOf">isSubPropertyOf</a> (self, <a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a> other)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../nepomuk/Nepomuk.Types.Literal.html">Nepomuk.Types.Literal</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#literalRangeType">literalRangeType</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#maxCardinality">maxCardinality</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#minCardinality">minCardinality</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">[<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>] </td><td class="memItemRight" valign="bottom"><a class="el" href="#parentProperties">parentProperties</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../nepomuk/Nepomuk.Types.Class.html">Nepomuk.Types.Class</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#range">range</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">[<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>] </td><td class="memItemRight" valign="bottom"><a class="el" href="#subProperties">subProperties</a> (self)</td></tr>
</table>
<hr><h2>Method Documentation</h2><a class="anchor" name="Property"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Default copy constructor
</p></div></div><a class="anchor" name="Property"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qurl.html">QUrl</a> </td>
<td class="paramname"><em>uri</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Create the property referred to by <b>uri.</b>
The result is either a valid property which could be loaded from the
Nepomuk store or a simple property which only contains the uri.
</p>
<p>
Be aware that the data is only loaded once read.
</p>
<p>
Subsequent calls result in a simple hash lookup of cached data.
</p></div></div><a class="anchor" name="Property"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a> </td>
<td class="paramname"><em>a0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Default copy constructor
</p></div></div><a class="anchor" name="cardinality"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">int cardinality</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>The cardinality of this property as specified by nrl:cardinality.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> the cardinality of the property or -1 if none was set.
</dd></dl> </p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="domain"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../nepomuk/Nepomuk.Types.Class.html">Nepomuk.Types.Class</a> domain</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>The domain of the property.
</p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="inverseProperty"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a> inverseProperty</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>The inverse property (nrl:inverseProperty).
<dl class="return" compact><dt><b>Returns:</b></dt><dd> A Property instance representing the inverse property of this one
or 0 if none was specified in the ontology.
</dd></dl> </p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="isParentOf"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool isParentOf</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a> </td>
<td class="paramname"><em>other</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Check if a property inherits this property. This is a recursive method which
does not only check direct child propertyes.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> true if other is derived from this property, false otherwise.
</dd></dl> </p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="isSubPropertyOf"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool isSubPropertyOf</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a> </td>
<td class="paramname"><em>other</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Check if this property is derived from another property. This is a recursive method which
does not only check direct child propertyes.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> true if this property is derived from other, false otherwise.
</dd></dl> </p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="literalRangeType"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../nepomuk/Nepomuk.Types.Literal.html">Nepomuk.Types.Literal</a> literalRangeType</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>If the rage of this property is a literal (i.e. range returns an invalid Class)
this method provides the literal type.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> the literal type of this property or an empty, invalid Literal
if the range is a Class.
</dd></dl> </p>
<p>
\sa range
</p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="maxCardinality"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">int maxCardinality</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>The maximum cardinality of this property as specified by nrl:maxCardinality.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> the maximum cardinality of the property or -1 if none was set.
</dd></dl> </p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="minCardinality"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">int minCardinality</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>The minimum cardinality of this property as specified by nrl:minCardinality.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> the minimum cardinality of the property or -1 if none was set.
</dd></dl> </p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="parentProperties"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">[<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>] parentProperties</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Each property can have multiple parent properties.
<dl class="return" compact><dt><b>Returns:</b></dt><dd> A list of all parent properties of this property.
If the list is emppty it means that the property has no direct
parents, i.e. it is derived from rdf:Resource.
</dd></dl> </p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="range"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../nepomuk/Nepomuk.Types.Class.html">Nepomuk.Types.Class</a> range</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>The range of the property.
<dl class="return" compact><dt><b>Returns:</b></dt><dd> The range of the property or an invalid Class in case
the range of this poperty is a literal.
</dd></dl> \sa literalRange
</p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div><a class="anchor" name="subProperties"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">[<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>] subProperties</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p><dl class="return" compact><dt><b>Returns:</b></dt><dd> A list of all properties that have this property as a parent.
Be aware that this list can never be final since other ontologies
that have not been loaded yet may contain properties that are derived
from this property.
</dd></dl> </p>
<p>
Const version
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p></div></div>
</div>
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