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<div class="refentry" title="Features">
<a name="raptor-section-feature"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="raptor-section-feature.top_of_page"></a>Features</span></h2>
<p>Features — Parser and Serializer features</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="raptor-section-feature.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">enum <a class="link" href="raptor-section-feature.html#raptor-feature" title="enum raptor_feature">raptor_feature</a>;
unsigned <span class="returnvalue">int</span> <a class="link" href="raptor-section-feature.html#raptor-get-feature-count" title="raptor_get_feature_count ()">raptor_get_feature_count</a> (void);
<span class="returnvalue">int</span> <a class="link" href="raptor-section-feature.html#raptor-features-enumerate" title="raptor_features_enumerate ()">raptor_features_enumerate</a> (const <a class="link" href="raptor-section-feature.html#raptor-feature" title="enum raptor_feature"><span class="returnvalue">raptor_feature</span></a> feature,
const <span class="returnvalue">char</span> **name,
<a class="link" href="raptor-section-uri.html#raptor-uri" title="raptor_uri"><span class="returnvalue">raptor_uri</span></a> **uri,
const <span class="returnvalue">char</span> **label);
<a class="link" href="raptor-section-feature.html#raptor-feature" title="enum raptor_feature"><span class="returnvalue">raptor_feature</span></a> <a class="link" href="raptor-section-feature.html#raptor-feature-from-uri" title="raptor_feature_from_uri ()">raptor_feature_from_uri</a> (<a class="link" href="raptor-section-uri.html#raptor-uri" title="raptor_uri"><span class="returnvalue">raptor_uri</span></a> *uri);
<span class="returnvalue">int</span> <a class="link" href="raptor-section-feature.html#raptor-feature-value-type" title="raptor_feature_value_type ()">raptor_feature_value_type</a> (const <a class="link" href="raptor-section-feature.html#raptor-feature" title="enum raptor_feature"><span class="returnvalue">raptor_feature</span></a> feature);
</pre>
</div>
<div class="refsect1" title="Description">
<a name="raptor-section-feature.description"></a><h2>Description</h2>
<p>
Optional parameters for <a class="link" href="raptor-section-parser.html#raptor-parser" title="raptor_parser"><span class="type">raptor_parser</span></a> and <a class="link" href="raptor-section-serializer.html#raptor-serializer" title="raptor_serializer"><span class="type">raptor_serializer</span></a>
objects that can be get and set. Utility functions also exist
to enumerate them, their description and the parameter type
taken.
</p>
</div>
<div class="refsect1" title="Details">
<a name="raptor-section-feature.details"></a><h2>Details</h2>
<div class="refsect2" title="enum raptor_feature">
<a name="raptor-feature"></a><h3>enum raptor_feature</h3>
<pre class="programlisting">typedef enum {
RAPTOR_FEATURE_SCANNING,
RAPTOR_FEATURE_ASSUME_IS_RDF,
RAPTOR_FEATURE_ALLOW_NON_NS_ATTRIBUTES,
RAPTOR_FEATURE_ALLOW_OTHER_PARSETYPES,
RAPTOR_FEATURE_ALLOW_BAGID,
RAPTOR_FEATURE_ALLOW_RDF_TYPE_RDF_LIST,
RAPTOR_FEATURE_NORMALIZE_LANGUAGE,
RAPTOR_FEATURE_NON_NFC_FATAL,
RAPTOR_FEATURE_WARN_OTHER_PARSETYPES,
RAPTOR_FEATURE_CHECK_RDF_ID,
RAPTOR_FEATURE_RELATIVE_URIS,
RAPTOR_FEATURE_START_URI,
RAPTOR_FEATURE_WRITER_AUTO_INDENT,
RAPTOR_FEATURE_WRITER_AUTO_EMPTY,
RAPTOR_FEATURE_WRITER_INDENT_WIDTH,
RAPTOR_FEATURE_WRITER_XML_VERSION,
RAPTOR_FEATURE_WRITER_XML_DECLARATION,
RAPTOR_FEATURE_NO_NET,
RAPTOR_FEATURE_RESOURCE_BORDER,
RAPTOR_FEATURE_LITERAL_BORDER,
RAPTOR_FEATURE_BNODE_BORDER,
RAPTOR_FEATURE_RESOURCE_FILL,
RAPTOR_FEATURE_LITERAL_FILL,
RAPTOR_FEATURE_BNODE_FILL,
RAPTOR_FEATURE_HTML_TAG_SOUP,
RAPTOR_FEATURE_MICROFORMATS,
RAPTOR_FEATURE_HTML_LINK,
RAPTOR_FEATURE_WWW_TIMEOUT,
RAPTOR_FEATURE_WRITE_BASE_URI,
RAPTOR_FEATURE_WWW_HTTP_CACHE_CONTROL,
RAPTOR_FEATURE_WWW_HTTP_USER_AGENT,
RAPTOR_FEATURE_JSON_CALLBACK,
RAPTOR_FEATURE_JSON_EXTRA_DATA,
RAPTOR_FEATURE_RSS_TRIPLES,
RAPTOR_FEATURE_ATOM_ENTRY_URI,
RAPTOR_FEATURE_PREFIX_ELEMENTS,
RAPTOR_FEATURE_LAST = RAPTOR_FEATURE_PREFIX_ELEMENTS
} raptor_feature;
</pre>
<p>
Raptor parser, serializer or XML writer features.</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="RAPTOR-FEATURE-SCANNING:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_SCANNING</code></span></p></td>
<td> If true (default false), the RDF/XML
parser will look for embedded rdf:RDF elements inside the XML
content, and not require that the XML start with an rdf:RDF root
element.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-ASSUME-IS-RDF:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_ASSUME_IS_RDF</code></span></p></td>
<td> If true (default false) then the
RDF/XML parser will assume the content is RDF/XML, not require
that rdf:RDF root element, and immediately interpret the content
as RDF/XML.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-ALLOW-NON-NS-ATTRIBUTES:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_ALLOW_NON_NS_ATTRIBUTES</code></span></p></td>
<td> If true (default true)
then the RDF/XML parser will allow non-XML namespaced attributes
to be accepted as well as rdf: namespaced ones. For example,
'about' and 'ID' will be interpreted as if they were rdf:about
and rdf:ID respectively.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-ALLOW-OTHER-PARSETYPES:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_ALLOW_OTHER_PARSETYPES</code></span></p></td>
<td> If true (default true)
then the RDF/XML parser will allow unknown parsetypes to be
present and will pass them on to the user. Unimplemented at
present.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-ALLOW-BAGID:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_ALLOW_BAGID</code></span></p></td>
<td> If true (default true) then the
RDF/XML parser will support the rdf:bagID attribute that was
removed from the RDF/XML language when it was revised. This
support may be removed in future.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-ALLOW-RDF-TYPE-RDF-LIST:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_ALLOW_RDF_TYPE_RDF_LIST</code></span></p></td>
<td> If true (default false)
then the RDF/XML parser will generate the idList rdf:type
rdf:List triple in the handling of rdf:parseType="Collection".
This triple was removed during the revising of RDF/XML after
collections were initially added.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-NORMALIZE-LANGUAGE:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_NORMALIZE_LANGUAGE</code></span></p></td>
<td> If true (default true) then
XML language values such as from xml:lang will be normalized to
lowercase.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-NON-NFC-FATAL:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_NON_NFC_FATAL</code></span></p></td>
<td> If true (default false) then
illegal Unicode Normal Form C in literals will give a fatal
error, otherwise just a warning.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WARN-OTHER-PARSETYPES:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WARN_OTHER_PARSETYPES</code></span></p></td>
<td> If true (default true) then
the RDF/XML parser will warn about unknown rdf:parseType values.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-CHECK-RDF-ID:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_CHECK_RDF_ID</code></span></p></td>
<td> If true (default true) then the
RDF/XML will check rdf:ID attribute values for duplicates and
cause an error if any are found.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-RELATIVE-URIS:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_RELATIVE_URIS</code></span></p></td>
<td> If true (default true) then
relative URIs will be used wherever possible when serializing.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-START-URI:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_START_URI</code></span></p></td>
<td> Set the start URI for serlalizing to use.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WRITER-AUTO-INDENT:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WRITER_AUTO_INDENT</code></span></p></td>
<td> Automatically indent elements when
seriailizing.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WRITER-AUTO-EMPTY:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WRITER_AUTO_EMPTY</code></span></p></td>
<td> Automatically detect and
abbreviate empty elements when serializing.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WRITER-INDENT-WIDTH:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WRITER_INDENT_WIDTH</code></span></p></td>
<td> Integer number of spaces to use
for each indent level when serializing with auto indent.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WRITER-XML-VERSION:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WRITER_XML_VERSION</code></span></p></td>
<td> Integer XML version XML 1.0 (10) or XML 1.1 (11)
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WRITER-XML-DECLARATION:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WRITER_XML_DECLARATION</code></span></p></td>
<td> Write XML 1.0 or 1.1 declaration.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-NO-NET:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_NO_NET</code></span></p></td>
<td> Deny network requests.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-RESOURCE-BORDER:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_RESOURCE_BORDER</code></span></p></td>
<td> Border color of resource
nodes for GraphViz DOT serializer.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-LITERAL-BORDER:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_LITERAL_BORDER</code></span></p></td>
<td> Border color of literal nodes
for GraphViz DOT serializer.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-BNODE-BORDER:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_BNODE_BORDER</code></span></p></td>
<td> Border color of blank nodes for
GraphViz DOT serializer.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-RESOURCE-FILL:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_RESOURCE_FILL</code></span></p></td>
<td> Fill color of resource nodes
for GraphViz DOT serializer.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-LITERAL-FILL:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_LITERAL_FILL</code></span></p></td>
<td> Fill color of literal nodes for
GraphViz DOT serializer.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-BNODE-FILL:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_BNODE_FILL</code></span></p></td>
<td> Fill color of blank nodes for
GraphViz DOT serializer.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-HTML-TAG-SOUP:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_HTML_TAG_SOUP</code></span></p></td>
<td> Use a lax HTML parser if an XML parser
fails when read HTML for GRDDL parser.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-MICROFORMATS:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_MICROFORMATS</code></span></p></td>
<td> Look for microformats for GRDDL parser.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-HTML-LINK:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_HTML_LINK</code></span></p></td>
<td> Look for head <link> to type rdf/xml
for GRDDL parser.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WWW-TIMEOUT:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WWW_TIMEOUT</code></span></p></td>
<td> Set timeout for internal WWW URI requests
for GRDDL parser.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WRITE-BASE-URI:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WRITE_BASE_URI</code></span></p></td>
<td> Write <em class="parameter"><code>base</code></em> directive for Turtle/N3.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WWW-HTTP-CACHE-CONTROL:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WWW_HTTP_CACHE_CONTROL</code></span></p></td>
<td> HTTP Cache-Control: header
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-WWW-HTTP-USER-AGENT:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_WWW_HTTP_USER_AGENT</code></span></p></td>
<td> HTTP User-Agent: header
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-JSON-CALLBACK:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_JSON_CALLBACK</code></span></p></td>
<td> JSON serializer callback function.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-JSON-EXTRA-DATA:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_JSON_EXTRA_DATA</code></span></p></td>
<td> JSON serializer extra top-level data
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-RSS-TRIPLES:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_RSS_TRIPLES</code></span></p></td>
<td> Atom/RSS serializer writes extra RDF triples it finds (none, rdf-xml, atom-triples)
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-ATOM-ENTRY-URI:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_ATOM_ENTRY_URI</code></span></p></td>
<td> Atom entry URI. If given, generate an Atom Entry Document with the item having the given URI, otherwise generate an Atom Feed Document with any items found.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-PREFIX-ELEMENTS:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_PREFIX_ELEMENTS</code></span></p></td>
<td> Integer. If set, generate Atom/RSS1.0 documents with prefixed elements, otherwise unprefixed.
</td>
</tr>
<tr>
<td><p><a name="RAPTOR-FEATURE-LAST:CAPS"></a><span class="term"><code class="literal">RAPTOR_FEATURE_LAST</code></span></p></td>
<td> Internal
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="raptor_get_feature_count ()">
<a name="raptor-get-feature-count"></a><h3>raptor_get_feature_count ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">int</span> raptor_get_feature_count (void);</pre>
<p>
Get the count of features defined.
</p>
<p>
This is prefered to the compile time-only symbol <a class="link" href="raptor-section-feature.html#RAPTOR-FEATURE-LAST:CAPS"><span class="type">RAPTOR_FEATURE_LAST</span></a>
and returns a count of the number of features which is
<a class="link" href="raptor-section-feature.html#RAPTOR-FEATURE-LAST:CAPS"><span class="type">RAPTOR_FEATURE_LAST</span></a>+1.</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> count of features in the <a class="link" href="raptor-section-feature.html#raptor-feature" title="enum raptor_feature"><span class="type">raptor_feature</span></a> enumeration
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="raptor_features_enumerate ()">
<a name="raptor-features-enumerate"></a><h3>raptor_features_enumerate ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> raptor_features_enumerate (const <a class="link" href="raptor-section-feature.html#raptor-feature" title="enum raptor_feature"><span class="returnvalue">raptor_feature</span></a> feature,
const <span class="returnvalue">char</span> **name,
<a class="link" href="raptor-section-uri.html#raptor-uri" title="raptor_uri"><span class="returnvalue">raptor_uri</span></a> **uri,
const <span class="returnvalue">char</span> **label);</pre>
<p>
Get list of syntax features.
</p>
<p>
If uri is not NULL, a pointer to a new raptor_uri is returned
that must be freed by the caller with <a class="link" href="raptor-section-uri.html#raptor-free-uri" title="raptor_free_uri ()"><code class="function">raptor_free_uri()</code></a>.
</p>
<p>
<a class="link" href="raptor-section-world.html#raptor-init" title="raptor_init ()"><code class="function">raptor_init()</code></a> MUST have been called before calling this function.
Use <code class="function">raptor_features_enumerate_v2()</code> if using raptor_world APIs.</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td> feature enumeration (0+)
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td> pointer to store feature short name (or NULL)
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>uri</code></em> :</span></p></td>
<td> pointer to store feature URI (or NULL)
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>label</code></em> :</span></p></td>
<td> pointer to feature label (or NULL)
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> 0 on success, <0 on failure, >0 if feature is unknown
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="raptor_feature_from_uri ()">
<a name="raptor-feature-from-uri"></a><h3>raptor_feature_from_uri ()</h3>
<pre class="programlisting"><a class="link" href="raptor-section-feature.html#raptor-feature" title="enum raptor_feature"><span class="returnvalue">raptor_feature</span></a> raptor_feature_from_uri (<a class="link" href="raptor-section-uri.html#raptor-uri" title="raptor_uri"><span class="returnvalue">raptor_uri</span></a> *uri);</pre>
<p>
Turn a feature URI into an feature enum.
</p>
<p>
The allowed feature URIs are available via <a class="link" href="raptor-section-feature.html#raptor-features-enumerate" title="raptor_features_enumerate ()"><code class="function">raptor_features_enumerate()</code></a>.
</p>
<p>
<a class="link" href="raptor-section-world.html#raptor-init" title="raptor_init ()"><code class="function">raptor_init()</code></a> MUST have been called before calling this function.
Use <code class="function">raptor_feature_from_uri_v2()</code> if using raptor_world APIs.</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>uri</code></em> :</span></p></td>
<td> feature URI
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> < 0 if the feature is unknown
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="raptor_feature_value_type ()">
<a name="raptor-feature-value-type"></a><h3>raptor_feature_value_type ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> raptor_feature_value_type (const <a class="link" href="raptor-section-feature.html#raptor-feature" title="enum raptor_feature"><span class="returnvalue">raptor_feature</span></a> feature);</pre>
<p>
Get the type of a features.
</p>
<p>
The type of the <em class="parameter"><code>feature</code></em> is 0=integer , 1=string. Other values are
undefined. Most features are integer values and use
raptor_set_feature and <a class="link" href="raptor-section-parser.html#raptor-get-feature" title="raptor_get_feature ()"><code class="function">raptor_get_feature()</code></a>
( raptor_serializer_set_feature <a class="link" href="raptor-section-serializer.html#raptor-serializer-get-feature" title="raptor_serializer_get_feature ()"><code class="function">raptor_serializer_get_feature()</code></a> )
</p>
<p>
String value features use <a class="link" href="raptor-section-parser.html#raptor-parser-set-feature-string" title="raptor_parser_set_feature_string ()"><code class="function">raptor_parser_set_feature_string()</code></a> and
<a class="link" href="raptor-section-parser.html#raptor-parser-get-feature-string" title="raptor_parser_get_feature_string ()"><code class="function">raptor_parser_get_feature_string()</code></a>
( <a class="link" href="raptor-section-serializer.html#raptor-serializer-set-feature-string" title="raptor_serializer_set_feature_string ()"><code class="function">raptor_serializer_set_feature_string()</code></a>
and <a class="link" href="raptor-section-serializer.html#raptor-serializer-get-feature-string" title="raptor_serializer_get_feature_string ()"><code class="function">raptor_serializer_get_feature_string()</code></a> )</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td> raptor serializer or parser feature
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the type of the feature or <0 if <em class="parameter"><code>feature</code></em> is unknown
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
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