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KDE 4.4 PyKDE API Reference
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<h1>Statement Class Reference</h1>
<code>from PyKDE4.soprano import *</code>
<p>
Namespace: Soprano.Statement<br />
<h2>Detailed Description</h2>
<p>\class Statement statement.h Soprano/Statement
</p>
<p>
A Statement instance represents one RDF quadruple.
</p>
<p>
In %Soprano statements are quadruples, i.e. in addition to the subject, predicate, and
object nodes, they have a fourth node, the context. The context represents the named graph
in which the statement is stored. If the context is an empty node the statement is stored in
the default graph.
</p>
<p>
A Statement is valid if subject, predicate, and object are valid. Invalid statements can, however,
be used in many methods such as Model.listStatements as wildwards.
</p>
<p>
\sa Node
</p>
<p>
<dl class="author" compact><dt><b>Author:</b></dt><dd> Daniele Galdi <daniele.galdi@gmail.com><br>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="#Statement">__init__</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#Statement">__init__</a> (self, <a href="../soprano/Soprano.Node.html">Soprano.Node</a> subject, <a href="../soprano/Soprano.Node.html">Soprano.Node</a> predicate, <a href="../soprano/Soprano.Node.html">Soprano.Node</a> object, <a href="../soprano/Soprano.Node.html">Soprano.Node</a> context=Soprano.Node())</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#Statement">__init__</a> (self, <a href="../soprano/Soprano.Statement.html">Soprano.Statement</a> other)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#context">context</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#isValid">isValid</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#matches">matches</a> (self, <a href="../soprano/Soprano.Statement.html">Soprano.Statement</a> other)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#object">object</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#operator !=">operator !=</a> (self, <a href="../soprano/Soprano.Statement.html">Soprano.Statement</a> other)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#operator ==">operator ==</a> (self, <a href="../soprano/Soprano.Statement.html">Soprano.Statement</a> other)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#predicate">predicate</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setContext">setContext</a> (self, <a href="../soprano/Soprano.Node.html">Soprano.Node</a> context)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setObject">setObject</a> (self, <a href="../soprano/Soprano.Node.html">Soprano.Node</a> object)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setPredicate">setPredicate</a> (self, <a href="../soprano/Soprano.Node.html">Soprano.Node</a> predicate)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setSubject">setSubject</a> (self, <a href="../soprano/Soprano.Node.html">Soprano.Node</a> subject)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#subject">subject</a> (self)</td></tr>
</table>
<hr><h2>Method Documentation</h2><a class="anchor" name="Statement"></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 Constructor, build an empty (invalid) Statement.
</p></div></div><a class="anchor" name="Statement"></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="../soprano/Soprano.Node.html">Soprano.Node</a> </td>
<td class="paramname"><em>subject</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> </td>
<td class="paramname"><em>predicate</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> </td>
<td class="paramname"><em>object</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> </td>
<td class="paramname"><em>context=Soprano.Node()</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Build a Statement with the given subject, predicate and object.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>subject</em> </td><td> The subject (cannot be of type Node.LiteralNode)
</td></tr>
</table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>predicate</em> </td><td> The predicate (has to be of type Node.ResourceNode or Node.EmptyNode)
</td></tr>
</table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>object</em> </td><td> The object can be of either Node type.
</td></tr>
</table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>context</em> </td><td> The context node (has to be of type Node.ResourceNode or Node.EmptyNode)
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="Statement"></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="../soprano/Soprano.Statement.html">Soprano.Statement</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"></div></div><a class="anchor" name="context"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> context</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> The Context node.
</dd></dl>
</p></div></div><a class="anchor" name="isValid"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool isValid</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>A Statement is valid if the subject is a resource or blank
node, the predicate is a resource node,
and the object is a valid node.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> <b>true</b> if the Statement is valid, <b>false</b> otherwise
</dd></dl>
</p></div></div><a class="anchor" name="matches"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool matches</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="../soprano/Soprano.Statement.html">Soprano.Statement</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>Match this statement against template statement <b>other.</b> The only difference
to operator== is that empty nodes are matched as wildcards,
i.e. they match any other node.
</p>
<p>
Be aware that the following is NOT always true since only <b>other</b>
is treated a a wildcard:
</p>
<p>
<pre class="fragment">
// NOT always true:
a.matches(b) == b.matches(a)
</pre>
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> <b>true</b> if this statement matches other, <b>false</b> if not.
</dd></dl> </p>
<p>
\sa Node.matches()
</p></div></div><a class="anchor" name="object"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> object</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> The object.
</dd></dl>
</p></div></div><a class="anchor" name="operator !="></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool operator !=</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="../soprano/Soprano.Statement.html">Soprano.Statement</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"></div></div><a class="anchor" name="operator =="></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool operator ==</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="../soprano/Soprano.Statement.html">Soprano.Statement</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"></div></div><a class="anchor" name="predicate"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> predicate</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> The predicate.
</dd></dl>
</p></div></div><a class="anchor" name="setContext"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setContext</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="../soprano/Soprano.Node.html">Soprano.Node</a> </td>
<td class="paramname"><em>context</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Change the Statement context.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>context</em> </td><td> The new Context.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="setObject"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setObject</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="../soprano/Soprano.Node.html">Soprano.Node</a> </td>
<td class="paramname"><em>object</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Change the Statement object.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>object</em> </td><td> The new object.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="setPredicate"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setPredicate</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="../soprano/Soprano.Node.html">Soprano.Node</a> </td>
<td class="paramname"><em>predicate</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Change the Statement predicate.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>predicate</em> </td><td> The new predicate.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="setSubject"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setSubject</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="../soprano/Soprano.Node.html">Soprano.Node</a> </td>
<td class="paramname"><em>subject</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Change the Statement subject.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>subject</em> </td><td> The new subject.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="subject"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../soprano/Soprano.Node.html">Soprano.Node</a> subject</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> The subject.
</dd></dl>
</p></div></div>
</div>
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