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<div class="refentry" lang="en">
<a name="redland-storage"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2>
<a name="id2562605"></a><span class="refentrytitle">Triple stores.</span>
</h2>
<p>Triple stores. — RDF Triple stores</p>
</td>
<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">
typedef <a href="redland-storage.html#librdf-storage">librdf_storage</a>;
typedef <a href="redland-storage.html#librdf-storage-factory">librdf_storage_factory</a>;
void <a href="redland-storage.html#librdf-storage-register-factory">librdf_storage_register_factory</a> (<a href="redland-world.html#librdf-world">librdf_world</a> *world,
const char *name,
const char *label,
void (*factory) (librdf_storage_factory*));
int <a href="redland-storage.html#librdf-storage-enumerate">librdf_storage_enumerate</a> (<a href="redland-world.html#librdf-world">librdf_world</a> *world,
unsigned int counter,
const char **name,
const char **label);
<a href="redland-storage.html#librdf-storage">librdf_storage</a>* <a href="redland-storage.html#librdf-new-storage">librdf_new_storage</a> (<a href="redland-world.html#librdf-world">librdf_world</a> *world,
const char *storage_name,
const char *name,
const char *options_string);
<a href="redland-storage.html#librdf-storage">librdf_storage</a>* <a href="redland-storage.html#librdf-new-storage-with-options">librdf_new_storage_with_options</a>
(<a href="redland-world.html#librdf-world">librdf_world</a> *world,
const char *storage_name,
const char *name,
<a href="redland-hash.html#librdf-hash">librdf_hash</a> *options);
<a href="redland-storage.html#librdf-storage">librdf_storage</a>* <a href="redland-storage.html#librdf-new-storage-from-storage">librdf_new_storage_from_storage</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *old_storage);
<a href="redland-storage.html#librdf-storage">librdf_storage</a>* <a href="redland-storage.html#librdf-new-storage-from-factory">librdf_new_storage_from_factory</a>
(<a href="redland-world.html#librdf-world">librdf_world</a> *world,
<a href="redland-storage.html#librdf-storage-factory">librdf_storage_factory</a> *factory,
const char *name,
<a href="redland-hash.html#librdf-hash">librdf_hash</a> *options);
void <a href="redland-storage.html#librdf-free-storage">librdf_free_storage</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);
int <a href="redland-storage.html#librdf-storage-open">librdf_storage_open</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-model.html#librdf-model">librdf_model</a> *model);
int <a href="redland-storage.html#librdf-storage-close">librdf_storage_close</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);
int <a href="redland-storage.html#librdf-storage-size">librdf_storage_size</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);
int <a href="redland-storage.html#librdf-storage-add-statement">librdf_storage_add_statement</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);
int <a href="redland-storage.html#librdf-storage-add-statements">librdf_storage_add_statements</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-stream.html#librdf-stream">librdf_stream</a> *statement_stream);
int <a href="redland-storage.html#librdf-storage-remove-statement">librdf_storage_remove_statement</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);
int <a href="redland-storage.html#librdf-storage-contains-statement">librdf_storage_contains_statement</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);
<a href="redland-stream.html#librdf-stream">librdf_stream</a>* <a href="redland-storage.html#librdf-storage-serialise">librdf_storage_serialise</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);
<a href="redland-stream.html#librdf-stream">librdf_stream</a>* <a href="redland-storage.html#librdf-storage-find-statements">librdf_storage_find_statements</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);
<a href="redland-stream.html#librdf-stream">librdf_stream</a>* <a href="redland-storage.html#librdf-storage-find-statements-with-options">librdf_storage_find_statements_with_options</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement,
<a href="redland-node.html#librdf-node">librdf_node</a> *context_node,
<a href="redland-hash.html#librdf-hash">librdf_hash</a> *options);
<a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* <a href="redland-storage.html#librdf-storage-get-sources">librdf_storage_get_sources</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *arc,
<a href="redland-node.html#librdf-node">librdf_node</a> *target);
<a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* <a href="redland-storage.html#librdf-storage-get-arcs">librdf_storage_get_arcs</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *source,
<a href="redland-node.html#librdf-node">librdf_node</a> *target);
<a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* <a href="redland-storage.html#librdf-storage-get-targets">librdf_storage_get_targets</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *source,
<a href="redland-node.html#librdf-node">librdf_node</a> *arc);
<a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* <a href="redland-storage.html#librdf-storage-get-arcs-in">librdf_storage_get_arcs_in</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *node);
<a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* <a href="redland-storage.html#librdf-storage-get-arcs-out">librdf_storage_get_arcs_out</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *node);
int <a href="redland-storage.html#librdf-storage-has-arc-in">librdf_storage_has_arc_in</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *node,
<a href="redland-node.html#librdf-node">librdf_node</a> *property);
int <a href="redland-storage.html#librdf-storage-has-arc-out">librdf_storage_has_arc_out</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *node,
<a href="redland-node.html#librdf-node">librdf_node</a> *property);
int <a href="redland-storage.html#librdf-storage-context-add-statement">librdf_storage_context_add_statement</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);
int <a href="redland-storage.html#librdf-storage-context-add-statements">librdf_storage_context_add_statements</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context,
<a href="redland-stream.html#librdf-stream">librdf_stream</a> *stream);
int <a href="redland-storage.html#librdf-storage-context-remove-statement">librdf_storage_context_remove_statement</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);
int <a href="redland-storage.html#librdf-storage-context-remove-statements">librdf_storage_context_remove_statements</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context);
<a href="redland-stream.html#librdf-stream">librdf_stream</a>* <a href="redland-storage.html#librdf-storage-context-as-stream">librdf_storage_context_as_stream</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context);
<a href="redland-stream.html#librdf-stream">librdf_stream</a>* <a href="redland-storage.html#librdf-storage-context-serialise">librdf_storage_context_serialise</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context);
int <a href="redland-storage.html#librdf-storage-supports-query">librdf_storage_supports_query</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-query.html#librdf-query">librdf_query</a> *query);
<a href="redland-query-results.html#librdf-query-results">librdf_query_results</a>* <a href="redland-storage.html#librdf-storage-query-execute">librdf_storage_query_execute</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-query.html#librdf-query">librdf_query</a> *query);
int <a href="redland-storage.html#librdf-storage-sync">librdf_storage_sync</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);
<a href="redland-stream.html#librdf-stream">librdf_stream</a>* <a href="redland-storage.html#librdf-storage-find-statements-in-context">librdf_storage_find_statements_in_context</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement,
<a href="redland-node.html#librdf-node">librdf_node</a> *context_node);
<a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* <a href="redland-storage.html#librdf-storage-get-contexts">librdf_storage_get_contexts</a>
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);
<a href="redland-node.html#librdf-node">librdf_node</a>* <a href="redland-storage.html#librdf-storage-get-feature">librdf_storage_get_feature</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-uri.html#librdf-uri">librdf_uri</a> *feature);
int <a href="redland-storage.html#librdf-storage-set-feature">librdf_storage_set_feature</a> (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-uri.html#librdf-uri">librdf_uri</a> *feature,
<a href="redland-node.html#librdf-node">librdf_node</a> *value);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="id2635208"></a><h2>Description</h2>
<p>
Provides classes to create triple stores to back the RDF graph
interface (<a href="redland-model.html#librdf-model"><span class="type">librdf_model</span></a>). Most of the methods are for implementing
the RDF model API and have the same name.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2635234"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="id2635245"></a><h3>
<a name="librdf-storage"></a>librdf_storage</h3>
<a class="indexterm" name="id2635257"></a><pre class="programlisting">typedef struct librdf_storage_s librdf_storage;
</pre>
<p>
Redland storage class.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2635277"></a><h3>
<a name="librdf-storage-factory"></a>librdf_storage_factory</h3>
<a class="indexterm" name="id2635288"></a><pre class="programlisting">typedef struct librdf_storage_factory_s librdf_storage_factory;
</pre>
<p>
Redland storage factory class.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2635308"></a><h3>
<a name="librdf-storage-register-factory"></a>librdf_storage_register_factory ()</h3>
<a class="indexterm" name="id2635322"></a><pre class="programlisting">void librdf_storage_register_factory (<a href="redland-world.html#librdf-world">librdf_world</a> *world,
const char *name,
const char *label,
void (*factory) (librdf_storage_factory*));</pre>
<p>
Register a storage factory.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>world</code></em> :</span></td>
<td> redland world object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>name</code></em> :</span></td>
<td> the storage factory name
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>label</code></em> :</span></td>
<td> the storage factory label
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>factory</code></em> :</span></td>
<td> pointer to function to call to register the factory
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2650762"></a><h3>
<a name="librdf-storage-enumerate"></a>librdf_storage_enumerate ()</h3>
<a class="indexterm" name="id2650772"></a><pre class="programlisting">int librdf_storage_enumerate (<a href="redland-world.html#librdf-world">librdf_world</a> *world,
unsigned int counter,
const char **name,
const char **label);</pre>
<p>
Get information on storages.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>world</code></em> :</span></td>
<td> redland world object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>counter</code></em> :</span></td>
<td> index into the list of storages
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>name</code></em> :</span></td>
<td> pointer to store the name of the storage (or NULL)
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>label</code></em> :</span></td>
<td> pointer to store syntax readable label (or NULL)
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 on failure of if counter is out of range
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2650891"></a><h3>
<a name="librdf-new-storage"></a>librdf_new_storage ()</h3>
<a class="indexterm" name="id2650903"></a><pre class="programlisting"><a href="redland-storage.html#librdf-storage">librdf_storage</a>* librdf_new_storage (<a href="redland-world.html#librdf-world">librdf_world</a> *world,
const char *storage_name,
const char *name,
const char *options_string);</pre>
<p>
Constructor - create a new <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object.
</p>
<p>
The options are encoded as described in <code class="function">librdf_hash_from_string()</code>
and can be NULL if none are required.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>world</code></em> :</span></td>
<td> redland world object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>storage_name</code></em> :</span></td>
<td> the storage factory name
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>name</code></em> :</span></td>
<td> an identifier for the storage
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>options_string</code></em> :</span></td>
<td> options to initialise storage
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> a new <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2651057"></a><h3>
<a name="librdf-new-storage-with-options"></a>librdf_new_storage_with_options ()</h3>
<a class="indexterm" name="id2651070"></a><pre class="programlisting"><a href="redland-storage.html#librdf-storage">librdf_storage</a>* librdf_new_storage_with_options
(<a href="redland-world.html#librdf-world">librdf_world</a> *world,
const char *storage_name,
const char *name,
<a href="redland-hash.html#librdf-hash">librdf_hash</a> *options);</pre>
<p>
Constructor - create a new <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object.
</p>
<p>
The options can be NULL if none are required.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>world</code></em> :</span></td>
<td> redland world object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>storage_name</code></em> :</span></td>
<td> the storage factory name
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>name</code></em> :</span></td>
<td> an identifier for the storage
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>options</code></em> :</span></td>
<td> <a href="redland-hash.html#librdf-hash"><span class="type">librdf_hash</span></a> of options to use
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> a new <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2651222"></a><h3>
<a name="librdf-new-storage-from-storage"></a>librdf_new_storage_from_storage ()</h3>
<a class="indexterm" name="id2651235"></a><pre class="programlisting"><a href="redland-storage.html#librdf-storage">librdf_storage</a>* librdf_new_storage_from_storage
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *old_storage);</pre>
<p>
Should create a new storage in the same context as the existing one
as appropriate for the storage. For example, in a RDBMS storage
it would be a new database, or in on disk it would be a new
set of files. This will mean automatically generating
a new identifier for the storage, maybe based on the existing
storage identifier.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>old_storage</code></em> :</span></td>
<td> the existing storage <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> to use
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> a new <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2651317"></a><h3>
<a name="librdf-new-storage-from-factory"></a>librdf_new_storage_from_factory ()</h3>
<a class="indexterm" name="id2651330"></a><pre class="programlisting"><a href="redland-storage.html#librdf-storage">librdf_storage</a>* librdf_new_storage_from_factory
(<a href="redland-world.html#librdf-world">librdf_world</a> *world,
<a href="redland-storage.html#librdf-storage-factory">librdf_storage_factory</a> *factory,
const char *name,
<a href="redland-hash.html#librdf-hash">librdf_hash</a> *options);</pre>
<p>
Constructor - create a new <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object.
</p>
<p>
If the options are present, they become owned by the storage
and should no longer be used.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>world</code></em> :</span></td>
<td> redland world object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>factory</code></em> :</span></td>
<td> the factory to use to construct the storage
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>name</code></em> :</span></td>
<td> name to use for storage
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>options</code></em> :</span></td>
<td> <a href="redland-hash.html#librdf-hash"><span class="type">librdf_hash</span></a> of options to initialise storage
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> a new <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2651483"></a><h3>
<a name="librdf-free-storage"></a>librdf_free_storage ()</h3>
<a class="indexterm" name="id2651496"></a><pre class="programlisting">void librdf_free_storage (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);</pre>
<p>
Destructor - destroy a <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2651559"></a><h3>
<a name="librdf-storage-open"></a>librdf_storage_open ()</h3>
<a class="indexterm" name="id2651572"></a><pre class="programlisting">int librdf_storage_open (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-model.html#librdf-model">librdf_model</a> *model);</pre>
<p>
Start a model / storage association.
</p>
<p>
This is ended with <a href="redland-storage.html#librdf-storage-close"><code class="function">librdf_storage_close()</code></a></p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>model</code></em> :</span></td>
<td> model stored
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2651672"></a><h3>
<a name="librdf-storage-close"></a>librdf_storage_close ()</h3>
<a class="indexterm" name="id2651684"></a><pre class="programlisting">int librdf_storage_close (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);</pre>
<p>
End a model / storage association.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2651752"></a><h3>
<a name="librdf-storage-size"></a>librdf_storage_size ()</h3>
<a class="indexterm" name="id2651764"></a><pre class="programlisting">int librdf_storage_size (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);</pre>
<p>
Get the number of statements stored.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> The number of statements or < 0 if cannot be determined
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2651833"></a><h3>
<a name="librdf-storage-add-statement"></a>librdf_storage_add_statement ()</h3>
<a class="indexterm" name="id2651846"></a><pre class="programlisting">int librdf_storage_add_statement (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);</pre>
<p>
Add a statement to a storage.
</p>
<p>
The passed-in statement is copied when added to the store, not
shared with the store.
</p>
<p>
If the statement already exists in the store, it is not added
unless Redland contexts are being used.
</p>
<p>
Enforces that the statement is legal for RDF - URI or blank subject,
URI predicate and URI or blank or literal object (i.e. anything).</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>statement</code></em> :</span></td>
<td> <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> statement to add
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 on failure, <0 on error, >0 if statement was illegal
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2651961"></a><h3>
<a name="librdf-storage-add-statements"></a>librdf_storage_add_statements ()</h3>
<a class="indexterm" name="id2651974"></a><pre class="programlisting">int librdf_storage_add_statements (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-stream.html#librdf-stream">librdf_stream</a> *statement_stream);</pre>
<p>
Add a stream of statements to the storage.
</p>
<p>
If any of the statements already exists in the store, they are not
added unless Redland contexts are being used.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>statement_stream</code></em> :</span></td>
<td> <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of statements
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2652077"></a><h3>
<a name="librdf-storage-remove-statement"></a>librdf_storage_remove_statement ()</h3>
<a class="indexterm" name="id2652090"></a><pre class="programlisting">int librdf_storage_remove_statement (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);</pre>
<p>
Remove a statement from the storage.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>statement</code></em> :</span></td>
<td> <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> statement to remove
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2652187"></a><h3>
<a name="librdf-storage-contains-statement"></a>librdf_storage_contains_statement ()</h3>
<a class="indexterm" name="id2652201"></a><pre class="programlisting">int librdf_storage_contains_statement
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);</pre>
<p>
Test if a given statement is present in the storage.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>statement</code></em> :</span></td>
<td> <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> statement to check
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 if the storage contains the statement (>0 if illegal statement)
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2652300"></a><h3>
<a name="librdf-storage-serialise"></a>librdf_storage_serialise ()</h3>
<a class="indexterm" name="id2652311"></a><pre class="programlisting"><a href="redland-stream.html#librdf-stream">librdf_stream</a>* librdf_storage_serialise (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);</pre>
<p>
Serialise the storage as a librdf_stream of statemetns.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of statements or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2652387"></a><h3>
<a name="librdf-storage-find-statements"></a>librdf_storage_find_statements ()</h3>
<a class="indexterm" name="id2652401"></a><pre class="programlisting"><a href="redland-stream.html#librdf-stream">librdf_stream</a>* librdf_storage_find_statements
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);</pre>
<p>
Search the storage for matching statements.
</p>
<p>
Searches the storage for a (partial) statement as described in
<a href="redland-statement.html#librdf-statement-match"><code class="function">librdf_statement_match()</code></a> and returns a <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of
matching <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> objects.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>statement</code></em> :</span></td>
<td> <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> partial statement to find
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of matching statements (may be empty) or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2652501"></a><h3>
<a name="librdf-storage-find-statements-with-options"></a>librdf_storage_find_statements_with_options ()</h3>
<a class="indexterm" name="id2652515"></a><pre class="programlisting"><a href="redland-stream.html#librdf-stream">librdf_stream</a>* librdf_storage_find_statements_with_options
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement,
<a href="redland-node.html#librdf-node">librdf_node</a> *context_node,
<a href="redland-hash.html#librdf-hash">librdf_hash</a> *options);</pre>
<p>
Search the storage for matching statements with match options.
</p>
<p>
Searches the storage for a (partial) statement as described in
<a href="redland-statement.html#librdf-statement-match"><code class="function">librdf_statement_match()</code></a> and returns a <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of
matching <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> objects.
</p>
<p>
If options is given then the match is made according to
the given options. If options is NULL, this is equivalent
to librdf_storage_find_statements_in_context.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>statement</code></em> :</span></td>
<td> <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> partial statement to find
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>context_node</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> context node or NULL.
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>options</code></em> :</span></td>
<td> <a href="redland-hash.html#librdf-hash"><span class="type">librdf_hash</span></a> of matching options or NULL
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of matching statements (may be empty) or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2652691"></a><h3>
<a name="librdf-storage-get-sources"></a>librdf_storage_get_sources ()</h3>
<a class="indexterm" name="id2652702"></a><pre class="programlisting"><a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* librdf_storage_get_sources (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *arc,
<a href="redland-node.html#librdf-node">librdf_node</a> *target);</pre>
<p>
Return the sources (subjects) of arc in an RDF graph given arc (predicate) and target (object).
</p>
<p>
Searches the storage for arcs matching the given arc and target
and returns a list of the source <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> objects as an iterator</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>arc</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> arc
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>target</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> target
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-iterator.html#librdf-iterator"><span class="type">librdf_iterator</span></a> of <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> objects (may be empty) or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2652839"></a><h3>
<a name="librdf-storage-get-arcs"></a>librdf_storage_get_arcs ()</h3>
<a class="indexterm" name="id2652849"></a><pre class="programlisting"><a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* librdf_storage_get_arcs (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *source,
<a href="redland-node.html#librdf-node">librdf_node</a> *target);</pre>
<p>
Return the arcs (predicates) of an arc in an RDF graph given source (subject) and target (object).
</p>
<p>
Searches the storage for arcs matching the given source and target
and returns a list of the arc <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> objects as an iterator</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>source</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> source
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>target</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> target
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-iterator.html#librdf-iterator"><span class="type">librdf_iterator</span></a> of <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> objects (may be empty) or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2652985"></a><h3>
<a name="librdf-storage-get-targets"></a>librdf_storage_get_targets ()</h3>
<a class="indexterm" name="id2652996"></a><pre class="programlisting"><a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* librdf_storage_get_targets (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *source,
<a href="redland-node.html#librdf-node">librdf_node</a> *arc);</pre>
<p>
Return the targets (objects) of an arc in an RDF graph given source (subject) and arc (predicate).
</p>
<p>
Searches the storage for targets matching the given source and arc
and returns a list of the source <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> objects as an iterator</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>source</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> source
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>arc</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> arc
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-iterator.html#librdf-iterator"><span class="type">librdf_iterator</span></a> of <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> objects (may be empty) or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2653133"></a><h3>
<a name="librdf-storage-get-arcs-in"></a>librdf_storage_get_arcs_in ()</h3>
<a class="indexterm" name="id2653144"></a><pre class="programlisting"><a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* librdf_storage_get_arcs_in (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *node);</pre>
<p>
Return the properties pointing to the given resource.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>node</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> resource node
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-iterator.html#librdf-iterator"><span class="type">librdf_iterator</span></a> of <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> objects (may be empty) or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2653243"></a><h3>
<a name="librdf-storage-get-arcs-out"></a>librdf_storage_get_arcs_out ()</h3>
<a class="indexterm" name="id2653254"></a><pre class="programlisting"><a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* librdf_storage_get_arcs_out
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *node);</pre>
<p>
Return the properties pointing from the given resource.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>node</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> resource node
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-iterator.html#librdf-iterator"><span class="type">librdf_iterator</span></a> of <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> objects (may be empty) or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2653354"></a><h3>
<a name="librdf-storage-has-arc-in"></a>librdf_storage_has_arc_in ()</h3>
<a class="indexterm" name="id2653365"></a><pre class="programlisting">int librdf_storage_has_arc_in (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *node,
<a href="redland-node.html#librdf-node">librdf_node</a> *property);</pre>
<p>
Check if a node has a given property pointing to it.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>node</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> resource node
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>property</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> property node
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 if arc property does point to the resource node
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2653477"></a><h3>
<a name="librdf-storage-has-arc-out"></a>librdf_storage_has_arc_out ()</h3>
<a class="indexterm" name="id2653488"></a><pre class="programlisting">int librdf_storage_has_arc_out (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *node,
<a href="redland-node.html#librdf-node">librdf_node</a> *property);</pre>
<p>
Check if a node has a given property pointing from it.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>node</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> resource node
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>property</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> property node
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 if arc property does point from the resource node
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2653600"></a><h3>
<a name="librdf-storage-context-add-statement"></a>librdf_storage_context_add_statement ()</h3>
<a class="indexterm" name="id2653613"></a><pre class="programlisting">int librdf_storage_context_add_statement
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);</pre>
<p>
Add a statement to a storage in a context.
</p>
<p>
If <em class="parameter"><code>context</code></em> is NULL, this is equivalent to librdf_storage_add_statement</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>context</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> context node
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>statement</code></em> :</span></td>
<td> <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> statement to add
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2653735"></a><h3>
<a name="librdf-storage-context-add-statements"></a>librdf_storage_context_add_statements ()</h3>
<a class="indexterm" name="id2653748"></a><pre class="programlisting">int librdf_storage_context_add_statements
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context,
<a href="redland-stream.html#librdf-stream">librdf_stream</a> *stream);</pre>
<p>
Add statements to a storage with a context.
</p>
<p>
If <em class="parameter"><code>context</code></em> is NULL, this is equivalent to librdf_storage_add_statements</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>context</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> context
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>stream</code></em> :</span></td>
<td> <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> stream object
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> Non 0 on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2653870"></a><h3>
<a name="librdf-storage-context-remove-statement"></a>librdf_storage_context_remove_statement ()</h3>
<a class="indexterm" name="id2653883"></a><pre class="programlisting">int librdf_storage_context_remove_statement
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement);</pre>
<p>
Remove a statement from a storage in a context.
</p>
<p>
If <em class="parameter"><code>context</code></em> is NULL, this is equivalent to librdf_storage_remove_statement</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>context</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> context node
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>statement</code></em> :</span></td>
<td> <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> statement to remove
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654005"></a><h3>
<a name="librdf-storage-context-remove-statements"></a>librdf_storage_context_remove_statements ()</h3>
<a class="indexterm" name="id2654018"></a><pre class="programlisting">int librdf_storage_context_remove_statements
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context);</pre>
<p>
Remove statements from a storage with the given context.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>context</code></em> :</span></td>
<td> <a href="redland-uri.html#librdf-uri"><span class="type">librdf_uri</span></a> context
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> Non 0 on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654106"></a><h3>
<a name="librdf-storage-context-as-stream"></a>librdf_storage_context_as_stream ()</h3>
<a class="indexterm" name="id2654118"></a><pre class="programlisting"><a href="redland-stream.html#librdf-stream">librdf_stream</a>* librdf_storage_context_as_stream
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context);</pre>
<p>
List all statements in a storage context.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>context</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> context node
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of statements or NULL on failure or context is empty
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654212"></a><h3>
<a name="librdf-storage-context-serialise"></a>librdf_storage_context_serialise ()</h3>
<a class="indexterm" name="id2654225"></a><pre class="programlisting"><a href="redland-stream.html#librdf-stream">librdf_stream</a>* librdf_storage_context_serialise
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-node.html#librdf-node">librdf_node</a> *context);</pre>
<p>
List all statements in a storage context (DEPRECATED).
</p>
<p>
DEPRECATED to reduce confusion with the librdf_serializer class.
Please use librdf_storage_context_as_stream.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>context</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> context node
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of statements or NULL on failure or context is empty
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654324"></a><h3>
<a name="librdf-storage-supports-query"></a>librdf_storage_supports_query ()</h3>
<a class="indexterm" name="id2654337"></a><pre class="programlisting">int librdf_storage_supports_query (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-query.html#librdf-query">librdf_query</a> *query);</pre>
<p>
Check if a storage system supports a query language.
</p>
<p>
Not implemented.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>query</code></em> :</span></td>
<td> <a href="redland-query.html#librdf-query"><span class="type">librdf_query</span></a> query object
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non-0 if the query is supported.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654427"></a><h3>
<a name="librdf-storage-query-execute"></a>librdf_storage_query_execute ()</h3>
<a class="indexterm" name="id2654440"></a><pre class="programlisting"><a href="redland-query-results.html#librdf-query-results">librdf_query_results</a>* librdf_storage_query_execute
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-query.html#librdf-query">librdf_query</a> *query);</pre>
<p>
Run the given query against the storage.
</p>
<p>
Not implemented.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>query</code></em> :</span></td>
<td> <a href="redland-query.html#librdf-query"><span class="type">librdf_query</span></a> query object
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-query-results.html#librdf-query-results"><span class="type">librdf_query_results</span></a> or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654536"></a><h3>
<a name="librdf-storage-sync"></a>librdf_storage_sync ()</h3>
<a class="indexterm" name="id2654546"></a><pre class="programlisting">int librdf_storage_sync (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);</pre>
<p>
Synchronise the storage to the storage implementation.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non-0 on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654607"></a><h3>
<a name="librdf-storage-find-statements-in-context"></a>librdf_storage_find_statements_in_context ()</h3>
<a class="indexterm" name="id2654621"></a><pre class="programlisting"><a href="redland-stream.html#librdf-stream">librdf_stream</a>* librdf_storage_find_statements_in_context
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-statement.html#librdf-statement">librdf_statement</a> *statement,
<a href="redland-node.html#librdf-node">librdf_node</a> *context_node);</pre>
<p>
Search the storage for matching statements in a given context.
</p>
<p>
Searches the storage for a (partial) statement as described in
<a href="redland-statement.html#librdf-statement-match"><code class="function">librdf_statement_match()</code></a> in the given context and returns a
<a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of matching <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> objects. If
context is NULL, this is equivalent to librdf_storage_find_statements.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>statement</code></em> :</span></td>
<td> <a href="redland-statement.html#librdf-statement"><span class="type">librdf_statement</span></a> partial statement to find
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>context_node</code></em> :</span></td>
<td> context <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> (or NULL)
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-stream.html#librdf-stream"><span class="type">librdf_stream</span></a> of matching statements (may be empty) or NULL on failure
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654768"></a><h3>
<a name="librdf-storage-get-contexts"></a>librdf_storage_get_contexts ()</h3>
<a class="indexterm" name="id2654779"></a><pre class="programlisting"><a href="redland-iterator.html#librdf-iterator">librdf_iterator</a>* librdf_storage_get_contexts
(<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage);</pre>
<p>
Return the list of contexts in the store.
</p>
<p>
Returns an iterator of <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> context nodes for each
context in the store.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <a href="redland-iterator.html#librdf-iterator"><span class="type">librdf_iterator</span></a> of context nodes or NULL on failure or if contexts are not supported
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654858"></a><h3>
<a name="librdf-storage-get-feature"></a>librdf_storage_get_feature ()</h3>
<a class="indexterm" name="id2654869"></a><pre class="programlisting"><a href="redland-node.html#librdf-node">librdf_node</a>* librdf_storage_get_feature (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-uri.html#librdf-uri">librdf_uri</a> *feature);</pre>
<p>
Get the value of a storage feature.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>feature</code></em> :</span></td>
<td> <a href="redland-uri.html#librdf-uri"><span class="type">librdf_uri</span></a> feature property
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> new <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> feature value or NULL if no such feature
exists or the value is empty.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2654962"></a><h3>
<a name="librdf-storage-set-feature"></a>librdf_storage_set_feature ()</h3>
<a class="indexterm" name="id2654973"></a><pre class="programlisting">int librdf_storage_set_feature (<a href="redland-storage.html#librdf-storage">librdf_storage</a> *storage,
<a href="redland-uri.html#librdf-uri">librdf_uri</a> *feature,
<a href="redland-node.html#librdf-node">librdf_node</a> *value);</pre>
<p>
Set the value of a storage feature.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>storage</code></em> :</span></td>
<td> <a href="redland-storage.html#librdf-storage"><span class="type">librdf_storage</span></a> object
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>feature</code></em> :</span></td>
<td> <a href="redland-uri.html#librdf-uri"><span class="type">librdf_uri</span></a> feature property
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>value</code></em> :</span></td>
<td> <a href="redland-node.html#librdf-node"><span class="type">librdf_node</span></a> feature property value
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> non 0 on failure (negative if no such feature)
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
</body>
</html>