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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>RDF Triple (librdf_statement)</title>
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<a href="#redland-statement.description" class="shortcut">Description</a></nobr></td></tr>
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<a name="redland-statement"></a><div class="titlepage"></div>
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<div class="refnamediv"><table width="100%"><tr>
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<td valign="top">
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<h2><span class="refentrytitle"><a name="redland-statement.top_of_page"></a>RDF Triple (librdf_statement)</span></h2>
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<p>RDF Triple (librdf_statement) — RDF Triple.</p>
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</td>
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<td valign="top" align="right"></td>
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</tr></table></div>
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<div class="refsynopsisdiv">
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<a name="redland-statement.synopsis"></a><h2>Synopsis</h2>
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<pre class="synopsis">
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typedef <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a>;
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enum <a class="link" href="redland-statement.html#librdf-statement-part" title="enum librdf_statement_part">librdf_statement_part</a>;
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<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a>* <a class="link" href="redland-statement.html#librdf-new-statement" title="librdf_new_statement ()">librdf_new_statement</a> (<a class="link" href="redland-world.html#librdf-world" title="librdf_world">librdf_world</a> *world);
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<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a>* <a class="link" href="redland-statement.html#librdf-new-statement-from-statement" title="librdf_new_statement_from_statement ()">librdf_new_statement_from_statement</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);
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||||
<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a>* <a class="link" href="redland-statement.html#librdf-new-statement-from-nodes" title="librdf_new_statement_from_nodes ()">librdf_new_statement_from_nodes</a> (<a class="link" href="redland-world.html#librdf-world" title="librdf_world">librdf_world</a> *world,
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<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *subject,
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<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *predicate,
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<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *object);
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||||
void <a class="link" href="redland-statement.html#librdf-statement-init" title="librdf_statement_init ()">librdf_statement_init</a> (<a class="link" href="redland-world.html#librdf-world" title="librdf_world">librdf_world</a> *world,
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<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);
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||||
void <a class="link" href="redland-statement.html#librdf-statement-clear" title="librdf_statement_clear ()">librdf_statement_clear</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);
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void <a class="link" href="redland-statement.html#librdf-free-statement" title="librdf_free_statement ()">librdf_free_statement</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);
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<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a>* <a class="link" href="redland-statement.html#librdf-statement-get-subject" title="librdf_statement_get_subject ()">librdf_statement_get_subject</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);
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||||
void <a class="link" href="redland-statement.html#librdf-statement-set-subject" title="librdf_statement_set_subject ()">librdf_statement_set_subject</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
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||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *node);
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||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a>* <a class="link" href="redland-statement.html#librdf-statement-get-predicate" title="librdf_statement_get_predicate ()">librdf_statement_get_predicate</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);
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void <a class="link" href="redland-statement.html#librdf-statement-set-predicate" title="librdf_statement_set_predicate ()">librdf_statement_set_predicate</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
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||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *node);
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||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a>* <a class="link" href="redland-statement.html#librdf-statement-get-object" title="librdf_statement_get_object ()">librdf_statement_get_object</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);
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void <a class="link" href="redland-statement.html#librdf-statement-set-object" title="librdf_statement_set_object ()">librdf_statement_set_object</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
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<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *node);
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||||
int <a class="link" href="redland-statement.html#librdf-statement-is-complete" title="librdf_statement_is_complete ()">librdf_statement_is_complete</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);
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||||
unsigned char* <a class="link" href="redland-statement.html#librdf-statement-to-string" title="librdf_statement_to_string ()">librdf_statement_to_string</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);
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void <a class="link" href="redland-statement.html#librdf-statement-print" title="librdf_statement_print ()">librdf_statement_print</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
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||||
FILE *fh);
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||||
int <a class="link" href="redland-statement.html#librdf-statement-equals" title="librdf_statement_equals ()">librdf_statement_equals</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement1,
|
||||
<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement2);
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||||
int <a class="link" href="redland-statement.html#librdf-statement-match" title="librdf_statement_match ()">librdf_statement_match</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
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||||
<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *partial_statement);
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||||
size_t <a class="link" href="redland-statement.html#librdf-statement-encode" title="librdf_statement_encode ()">librdf_statement_encode</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
unsigned char *buffer,
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||||
size_t length);
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||||
size_t <a class="link" href="redland-statement.html#librdf-statement-encode-parts" title="librdf_statement_encode_parts ()">librdf_statement_encode_parts</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
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||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *context_node,
|
||||
unsigned char *buffer,
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||||
size_t length,
|
||||
<a class="link" href="redland-statement.html#librdf-statement-part" title="enum librdf_statement_part">librdf_statement_part</a> fields);
|
||||
size_t <a class="link" href="redland-statement.html#librdf-statement-decode" title="librdf_statement_decode ()">librdf_statement_decode</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
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unsigned char *buffer,
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||||
size_t length);
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||||
size_t <a class="link" href="redland-statement.html#librdf-statement-decode-parts" title="librdf_statement_decode_parts ()">librdf_statement_decode_parts</a> (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
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||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> **context_node,
|
||||
unsigned char *buffer,
|
||||
size_t length);
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||||
</pre>
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</div>
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<div class="refsect1" lang="en">
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<a name="redland-statement.description"></a><h2>Description</h2>
|
||||
<p>
|
||||
An object representing an RDF Triple of three RDF terms (<a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a>).
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Triples can be created, accessed, destroyed and en/decoded into a binary
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form for use in storage.
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</p>
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</div>
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<div class="refsect1" lang="en">
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<a name="redland-statement.details"></a><h2>Details</h2>
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<div class="refsect2" lang="en">
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||||
<a name="librdf-statement"></a><h3>librdf_statement</h3>
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||||
<pre class="programlisting">typedef struct librdf_statement_s librdf_statement;
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||||
</pre>
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<p>
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||||
Redland statement class.</p>
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<p>
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||||
|
||||
</p>
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||||
</div>
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<hr>
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||||
<div class="refsect2" lang="en">
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||||
<a name="librdf-statement-part"></a><h3>enum librdf_statement_part</h3>
|
||||
<pre class="programlisting">typedef enum {
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||||
LIBRDF_STATEMENT_SUBJECT = 1 << 0,
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LIBRDF_STATEMENT_PREDICATE = 1 << 1,
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LIBRDF_STATEMENT_OBJECT = 1 << 2,
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/* must be a combination of all of the above */
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LIBRDF_STATEMENT_ALL = (LIBRDF_STATEMENT_SUBJECT|
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LIBRDF_STATEMENT_PREDICATE|
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LIBRDF_STATEMENT_OBJECT)
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} librdf_statement_part;
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||||
</pre>
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||||
<p>
|
||||
Flags that are or-ed to indicate statement parts.
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||||
</p>
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||||
<p>
|
||||
Used in fields arguments to methods such as the public
|
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<a class="link" href="redland-statement.html#librdf-statement-encode-parts" title="librdf_statement_encode_parts ()"><code class="function">librdf_statement_encode_parts()</code></a> <a class="link" href="redland-statement.html#librdf-statement-decode-parts" title="librdf_statement_decode_parts ()"><code class="function">librdf_statement_decode_parts()</code></a>
|
||||
<a class="link" href="redland-stream.html#librdf-new-stream-from-node-iterator" title="librdf_new_stream_from_node_iterator ()"><code class="function">librdf_new_stream_from_node_iterator()</code></a> and the internal
|
||||
<code class="function">librdf_storage_node_stream_to_node_create()</code></p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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||||
<tr>
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||||
<td><p><a name="LIBRDF-STATEMENT-SUBJECT:CAPS"></a><span class="term"><code class="literal">LIBRDF_STATEMENT_SUBJECT</code></span></p></td>
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||||
<td> Subject of a statement.
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||||
</td>
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||||
</tr>
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||||
<tr>
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||||
<td><p><a name="LIBRDF-STATEMENT-PREDICATE:CAPS"></a><span class="term"><code class="literal">LIBRDF_STATEMENT_PREDICATE</code></span></p></td>
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<td> Predicate of a statement.
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</td>
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||||
</tr>
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||||
<tr>
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||||
<td><p><a name="LIBRDF-STATEMENT-OBJECT:CAPS"></a><span class="term"><code class="literal">LIBRDF_STATEMENT_OBJECT</code></span></p></td>
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||||
<td> Object of a statement.
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||||
</td>
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||||
</tr>
|
||||
<tr>
|
||||
<td><p><a name="LIBRDF-STATEMENT-ALL:CAPS"></a><span class="term"><code class="literal">LIBRDF_STATEMENT_ALL</code></span></p></td>
|
||||
<td> All parts of a statement.
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||||
</td>
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</tr>
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||||
</tbody>
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</table></div>
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</div>
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<hr>
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||||
<div class="refsect2" lang="en">
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<a name="librdf-new-statement"></a><h3>librdf_new_statement ()</h3>
|
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<pre class="programlisting"><a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a>* librdf_new_statement (<a class="link" href="redland-world.html#librdf-world" title="librdf_world">librdf_world</a> *world);</pre>
|
||||
<p>
|
||||
Constructor - create a new empty <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a>.</p>
|
||||
<p>
|
||||
|
||||
</p>
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||||
<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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||||
<tbody>
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<tr>
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||||
<td><p><span class="term"><em class="parameter"><code>world</code></em> :</span></p></td>
|
||||
<td> redland world object
|
||||
</td>
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||||
</tr>
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||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> a new <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> or NULL on failure
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-new-statement-from-statement"></a><h3>librdf_new_statement_from_statement ()</h3>
|
||||
<pre class="programlisting"><a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a>* librdf_new_statement_from_statement (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);</pre>
|
||||
<p>
|
||||
Copy constructor - create a new librdf_statement from an existing librdf_statement.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> to copy
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> a new <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> with copy or NULL on failure
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-new-statement-from-nodes"></a><h3>librdf_new_statement_from_nodes ()</h3>
|
||||
<pre class="programlisting"><a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a>* librdf_new_statement_from_nodes (<a class="link" href="redland-world.html#librdf-world" title="librdf_world">librdf_world</a> *world,
|
||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *subject,
|
||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *predicate,
|
||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *object);</pre>
|
||||
<p>
|
||||
Constructor - create a new <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> from existing <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> objects.
|
||||
</p>
|
||||
<p>
|
||||
The node objects become owned by the new statement (or freed on error).</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>world</code></em> :</span></p></td>
|
||||
<td> redland world object
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>subject</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>predicate</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> a new <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> with copy or NULL on failure
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-init"></a><h3>librdf_statement_init ()</h3>
|
||||
<pre class="programlisting">void librdf_statement_init (<a class="link" href="redland-world.html#librdf-world" title="librdf_world">librdf_world</a> *world,
|
||||
<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);</pre>
|
||||
<p>
|
||||
Initialise a statically declared librdf_statement.
|
||||
</p>
|
||||
<p>
|
||||
This MUST be called on a statically declared librdf_statement
|
||||
to initialise it properly. It is the responsibility of the
|
||||
user of the statically allocated librdf_statement to deal
|
||||
with deallocation of any statement parts (subject, predicate, object).</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>world</code></em> :</span></p></td>
|
||||
<td> redland world object
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-clear"></a><h3>librdf_statement_clear ()</h3>
|
||||
<pre class="programlisting">void librdf_statement_clear (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);</pre>
|
||||
<p>
|
||||
Empty a librdf_statement of nodes.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody><tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr></tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-free-statement"></a><h3>librdf_free_statement ()</h3>
|
||||
<pre class="programlisting">void librdf_free_statement (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);</pre>
|
||||
<p>
|
||||
Destructor - destroy a <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a>.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody><tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr></tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-get-subject"></a><h3>librdf_statement_get_subject ()</h3>
|
||||
<pre class="programlisting"><a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a>* librdf_statement_get_subject (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);</pre>
|
||||
<p>
|
||||
Get the statement subject.
|
||||
</p>
|
||||
<p>
|
||||
This method returns a SHARED pointer to the subject which must
|
||||
be copied by the caller if needed.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> a pointer to the <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> of the statement subject -
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-set-subject"></a><h3>librdf_statement_set_subject ()</h3>
|
||||
<pre class="programlisting">void librdf_statement_set_subject (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *node);</pre>
|
||||
<p>
|
||||
Set the statement subject.
|
||||
</p>
|
||||
<p>
|
||||
The subject passed in becomes owned by
|
||||
the statement object and must not be used by the caller after this call.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>node</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> of subject
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-get-predicate"></a><h3>librdf_statement_get_predicate ()</h3>
|
||||
<pre class="programlisting"><a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a>* librdf_statement_get_predicate (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);</pre>
|
||||
<p>
|
||||
Get the statement predicate.
|
||||
</p>
|
||||
<p>
|
||||
This method returns a SHARED pointer to the predicate which must
|
||||
be copied by the caller if needed.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> a pointer to the <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> of the statement predicate -
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-set-predicate"></a><h3>librdf_statement_set_predicate ()</h3>
|
||||
<pre class="programlisting">void librdf_statement_set_predicate (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *node);</pre>
|
||||
<p>
|
||||
Set the statement predicate.
|
||||
</p>
|
||||
<p>
|
||||
The predicate passed in becomes owned by
|
||||
the statement object and must not be used by the caller after this call.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>node</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> of predicate
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-get-object"></a><h3>librdf_statement_get_object ()</h3>
|
||||
<pre class="programlisting"><a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a>* librdf_statement_get_object (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);</pre>
|
||||
<p>
|
||||
Get the statement object.
|
||||
</p>
|
||||
<p>
|
||||
This method returns a SHARED pointer to the object which must
|
||||
be copied by the caller if needed.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> a pointer to the <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> of the statement object -
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-set-object"></a><h3>librdf_statement_set_object ()</h3>
|
||||
<pre class="programlisting">void librdf_statement_set_object (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *node);</pre>
|
||||
<p>
|
||||
Set the statement object.
|
||||
</p>
|
||||
<p>
|
||||
The object passed in becomes owned by
|
||||
the statement object and must not be used by the caller after this call.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>node</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> of object
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-is-complete"></a><h3>librdf_statement_is_complete ()</h3>
|
||||
<pre class="programlisting">int librdf_statement_is_complete (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);</pre>
|
||||
<p>
|
||||
Check if statement is a complete and legal RDF triple.
|
||||
</p>
|
||||
<p>
|
||||
Checks that all subject, predicate, object fields are present
|
||||
and they have the allowed node types.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a> object
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> non 0 if the statement is complete and legal
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-to-string"></a><h3>librdf_statement_to_string ()</h3>
|
||||
<pre class="programlisting">unsigned char* librdf_statement_to_string (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement);</pre>
|
||||
<p>
|
||||
Format the librdf_statement as a string.
|
||||
</p>
|
||||
<p>
|
||||
Formats the statement as a newly allocate string that must be freed by
|
||||
the caller.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> the statement
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> the string or NULL on failure.
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-print"></a><h3>librdf_statement_print ()</h3>
|
||||
<pre class="programlisting">void librdf_statement_print (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
FILE *fh);</pre>
|
||||
<p>
|
||||
Pretty print the statement to a file descriptor.
|
||||
</p>
|
||||
<p>
|
||||
This method is for debugging and the format of the output should
|
||||
not be relied on.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> the statement
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>fh</code></em> :</span></p></td>
|
||||
<td> file handle
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-equals"></a><h3>librdf_statement_equals ()</h3>
|
||||
<pre class="programlisting">int librdf_statement_equals (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement1,
|
||||
<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement2);</pre>
|
||||
<p>
|
||||
Check if two statements are equal.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement1</code></em> :</span></p></td>
|
||||
<td> first <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement2</code></em> :</span></p></td>
|
||||
<td> second <a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement"><span class="type">librdf_statement</span></a>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> non 0 if statements are equal
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-match"></a><h3>librdf_statement_match ()</h3>
|
||||
<pre class="programlisting">int librdf_statement_match (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *partial_statement);</pre>
|
||||
<p>
|
||||
Match a statement against a 'partial' statement.
|
||||
</p>
|
||||
<p>
|
||||
A partial statement is where some parts of the statement -
|
||||
subject, predicate or object can be empty (NULL).
|
||||
Empty parts match against any value, parts with values
|
||||
must match exactly. Node matching is done via <a class="link" href="redland-node.html#librdf-node-equals" title="librdf_node_equals ()"><code class="function">librdf_node_equals()</code></a></p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> statement
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>partial_statement</code></em> :</span></p></td>
|
||||
<td> statement with possible empty parts
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> non 0 on match
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-encode"></a><h3>librdf_statement_encode ()</h3>
|
||||
<pre class="programlisting">size_t librdf_statement_encode (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
unsigned char *buffer,
|
||||
size_t length);</pre>
|
||||
<p>
|
||||
Serialise a statement into a buffer.
|
||||
</p>
|
||||
<p>
|
||||
Encodes the given statement in the buffer, which must be of sufficient
|
||||
size. If buffer is NULL, no work is done but the size of buffer
|
||||
required is returned.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> the statement to serialise
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
|
||||
<td> the buffer to use
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
|
||||
<td> buffer size
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> the number of bytes written or 0 on failure.
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-encode-parts"></a><h3>librdf_statement_encode_parts ()</h3>
|
||||
<pre class="programlisting">size_t librdf_statement_encode_parts (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> *context_node,
|
||||
unsigned char *buffer,
|
||||
size_t length,
|
||||
<a class="link" href="redland-statement.html#librdf-statement-part" title="enum librdf_statement_part">librdf_statement_part</a> fields);</pre>
|
||||
<p>
|
||||
Serialise parts of a statement into a buffer.
|
||||
</p>
|
||||
<p>
|
||||
Encodes the given statement in the buffer, which must be of sufficient
|
||||
size. If buffer is NULL, no work is done but the size of buffer
|
||||
required is returned.
|
||||
</p>
|
||||
<p>
|
||||
The fields values are or-ed combinations of:
|
||||
LIBRDF_STATEMENT_SUBJECT LIBRDF_STATEMENT_PREDICATE
|
||||
LIBRDF_STATEMENT_OBJECT
|
||||
or LIBRDF_STATEMENT_ALL for subject,prdicate,object fields
|
||||
</p>
|
||||
<p>
|
||||
If context_node is given, it is encoded also</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> statement to serialise
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>context_node</code></em> :</span></p></td>
|
||||
<td> <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> context node (can be NULL)
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
|
||||
<td> the buffer to use
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
|
||||
<td> buffer size
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>fields</code></em> :</span></p></td>
|
||||
<td> fields to encode
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> the number of bytes written or 0 on failure.
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-decode"></a><h3>librdf_statement_decode ()</h3>
|
||||
<pre class="programlisting">size_t librdf_statement_decode (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
unsigned char *buffer,
|
||||
size_t length);</pre>
|
||||
<p>
|
||||
Decodes a statement from a buffer.
|
||||
</p>
|
||||
<p>
|
||||
Decodes the serialised statement (as created by <a class="link" href="redland-statement.html#librdf-statement-encode" title="librdf_statement_encode ()"><code class="function">librdf_statement_encode()</code></a> )
|
||||
from the given buffer.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> the statement to deserialise into
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
|
||||
<td> the buffer to use
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
|
||||
<td> buffer size
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> number of bytes used or 0 on failure (bad encoding, allocation failure)
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<hr>
|
||||
<div class="refsect2" lang="en">
|
||||
<a name="librdf-statement-decode-parts"></a><h3>librdf_statement_decode_parts ()</h3>
|
||||
<pre class="programlisting">size_t librdf_statement_decode_parts (<a class="link" href="redland-statement.html#librdf-statement" title="librdf_statement">librdf_statement</a> *statement,
|
||||
<a class="link" href="redland-node.html#librdf-node" title="librdf_node">librdf_node</a> **context_node,
|
||||
unsigned char *buffer,
|
||||
size_t length);</pre>
|
||||
<p>
|
||||
Decodes a statement + context node from a buffer.
|
||||
</p>
|
||||
<p>
|
||||
Decodes the serialised statement (as created by <a class="link" href="redland-statement.html#librdf-statement-encode" title="librdf_statement_encode ()"><code class="function">librdf_statement_encode()</code></a> )
|
||||
from the given buffer. If a context node is found and context_node is
|
||||
not NULL, a pointer to the new <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> is stored in *context_node.</p>
|
||||
<p>
|
||||
|
||||
</p>
|
||||
<div class="variablelist"><table border="0">
|
||||
<col align="left" valign="top">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>statement</code></em> :</span></p></td>
|
||||
<td> the statement to deserialise into
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>context_node</code></em> :</span></p></td>
|
||||
<td> pointer to <a class="link" href="redland-node.html#librdf-node" title="librdf_node"><span class="type">librdf_node</span></a> context_node to deserialise into
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
|
||||
<td> the buffer to use
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
|
||||
<td> buffer size
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
|
||||
<td> number of bytes used or 0 on failure (bad encoding, allocation failure)
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="footer">
|
||||
<hr>
|
||||
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|
||||
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|
||||
</html>
|
||||
Reference in New Issue
Block a user