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  <h1>Source code for rdflib.plugins.serializers.rdfxml</h1><div class="highlight"><pre>
<span class="kn">from</span> <span class="nn">rdflib.plugins.serializers.xmlwriter</span> <span class="kn">import</span> <span class="n">XMLWriter</span>

<span class="kn">from</span> <span class="nn">rdflib.namespace</span> <span class="kn">import</span> <span class="n">Namespace</span><span class="p">,</span> <span class="n">RDF</span><span class="p">,</span> <span class="n">RDFS</span>  <span class="c"># , split_uri</span>

<span class="kn">from</span> <span class="nn">rdflib.term</span> <span class="kn">import</span> <span class="n">URIRef</span><span class="p">,</span> <span class="n">Literal</span><span class="p">,</span> <span class="n">BNode</span>
<span class="kn">from</span> <span class="nn">rdflib.util</span> <span class="kn">import</span> <span class="n">first</span><span class="p">,</span> <span class="n">more_than</span>
<span class="kn">from</span> <span class="nn">rdflib.collection</span> <span class="kn">import</span> <span class="n">Collection</span>
<span class="kn">from</span> <span class="nn">rdflib.serializer</span> <span class="kn">import</span> <span class="n">Serializer</span>

<span class="c"># from rdflib.exceptions import Error</span>

<span class="kn">from</span> <span class="nn">rdflib.py3compat</span> <span class="kn">import</span> <span class="n">b</span>

<span class="kn">from</span> <span class="nn">xml.sax.saxutils</span> <span class="kn">import</span> <span class="n">quoteattr</span><span class="p">,</span> <span class="n">escape</span>
<span class="kn">import</span> <span class="nn">xml.dom.minidom</span>

<span class="kn">from</span> <span class="nn">xmlwriter</span> <span class="kn">import</span> <span class="n">ESCAPE_ENTITIES</span>

<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;fix&#39;</span><span class="p">,</span> <span class="s">&#39;XMLSerializer&#39;</span><span class="p">,</span> <span class="s">&#39;PrettyXMLSerializer&#39;</span><span class="p">]</span>


<div class="viewcode-block" id="XMLSerializer"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.XMLSerializer">[docs]</a><span class="k">class</span> <span class="nc">XMLSerializer</span><span class="p">(</span><span class="n">Serializer</span><span class="p">):</span>

<div class="viewcode-block" id="XMLSerializer.__init__"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.XMLSerializer.__init__">[docs]</a>    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">store</span><span class="p">):</span>
        <span class="nb">super</span><span class="p">(</span><span class="n">XMLSerializer</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="n">store</span><span class="p">)</span>
</div>
    <span class="k">def</span> <span class="nf">__bindings</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="n">store</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span>
        <span class="n">nm</span> <span class="o">=</span> <span class="n">store</span><span class="o">.</span><span class="n">namespace_manager</span>
        <span class="n">bindings</span> <span class="o">=</span> <span class="p">{}</span>

        <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="nb">set</span><span class="p">(</span><span class="n">store</span><span class="o">.</span><span class="n">predicates</span><span class="p">()):</span>
            <span class="n">prefix</span><span class="p">,</span> <span class="n">namespace</span><span class="p">,</span> <span class="n">name</span> <span class="o">=</span> <span class="n">nm</span><span class="o">.</span><span class="n">compute_qname</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span>
            <span class="n">bindings</span><span class="p">[</span><span class="n">prefix</span><span class="p">]</span> <span class="o">=</span> <span class="n">URIRef</span><span class="p">(</span><span class="n">namespace</span><span class="p">)</span>

        <span class="n">RDFNS</span> <span class="o">=</span> <span class="n">URIRef</span><span class="p">(</span><span class="s">&quot;http://www.w3.org/1999/02/22-rdf-syntax-ns#&quot;</span><span class="p">)</span>

        <span class="k">if</span> <span class="s">&quot;rdf&quot;</span> <span class="ow">in</span> <span class="n">bindings</span><span class="p">:</span>
            <span class="k">assert</span> <span class="n">bindings</span><span class="p">[</span><span class="s">&quot;rdf&quot;</span><span class="p">]</span> <span class="o">==</span> <span class="n">RDFNS</span>
        <span class="k">else</span><span class="p">:</span>
            <span class="n">bindings</span><span class="p">[</span><span class="s">&quot;rdf&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="n">RDFNS</span>

        <span class="k">for</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">namespace</span> <span class="ow">in</span> <span class="n">bindings</span><span class="o">.</span><span class="n">iteritems</span><span class="p">():</span>
            <span class="k">yield</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">namespace</span>

<div class="viewcode-block" id="XMLSerializer.serialize"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.XMLSerializer.serialize">[docs]</a>    <span class="k">def</span> <span class="nf">serialize</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">stream</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">encoding</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="o">**</span><span class="n">args</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">base</span> <span class="o">=</span> <span class="n">base</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__stream</span> <span class="o">=</span> <span class="n">stream</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span> <span class="o">=</span> <span class="p">{}</span>
        <span class="n">encoding</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">encoding</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">write</span> <span class="o">=</span> <span class="n">write</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">uni</span><span class="p">:</span> <span class="n">stream</span><span class="o">.</span><span class="n">write</span><span class="p">(</span>
            <span class="n">uni</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="n">encoding</span><span class="p">,</span> <span class="s">&#39;replace&#39;</span><span class="p">))</span>

        <span class="c"># startDocument</span>
        <span class="n">write</span><span class="p">(</span><span class="s">&#39;&lt;?xml version=&quot;1.0&quot; encoding=&quot;</span><span class="si">%s</span><span class="s">&quot;?&gt;</span><span class="se">\n</span><span class="s">&#39;</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">encoding</span><span class="p">)</span>

        <span class="c"># startRDF</span>
        <span class="n">write</span><span class="p">(</span><span class="s">&#39;&lt;rdf:RDF</span><span class="se">\n</span><span class="s">&#39;</span><span class="p">)</span>

        <span class="c"># If provided, write xml:base attribute for the RDF</span>
        <span class="k">if</span> <span class="s">&quot;xml_base&quot;</span> <span class="ow">in</span> <span class="n">args</span><span class="p">:</span>
            <span class="n">write</span><span class="p">(</span><span class="s">&#39;   xml:base=&quot;</span><span class="si">%s</span><span class="s">&quot;</span><span class="se">\n</span><span class="s">&#39;</span> <span class="o">%</span> <span class="n">args</span><span class="p">[</span><span class="s">&#39;xml_base&#39;</span><span class="p">])</span>
        <span class="c"># TODO:</span>
        <span class="c"># assert(</span>
        <span class="c">#    namespaces[&quot;http://www.w3.org/1999/02/22-rdf-syntax-ns#&quot;]==&#39;rdf&#39;)</span>
        <span class="n">bindings</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__bindings</span><span class="p">())</span>
        <span class="n">bindings</span><span class="o">.</span><span class="n">sort</span><span class="p">()</span>

        <span class="k">for</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">namespace</span> <span class="ow">in</span> <span class="n">bindings</span><span class="p">:</span>
            <span class="k">if</span> <span class="n">prefix</span><span class="p">:</span>
                <span class="n">write</span><span class="p">(</span><span class="s">&#39;   xmlns:</span><span class="si">%s</span><span class="s">=&quot;</span><span class="si">%s</span><span class="s">&quot;</span><span class="se">\n</span><span class="s">&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="n">prefix</span><span class="p">,</span> <span class="n">namespace</span><span class="p">))</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="n">write</span><span class="p">(</span><span class="s">&#39;   xmlns=&quot;</span><span class="si">%s</span><span class="s">&quot;</span><span class="se">\n</span><span class="s">&#39;</span> <span class="o">%</span> <span class="n">namespace</span><span class="p">)</span>
        <span class="n">write</span><span class="p">(</span><span class="s">&#39;&gt;</span><span class="se">\n</span><span class="s">&#39;</span><span class="p">)</span>

        <span class="c"># write out triples by subject</span>
        <span class="k">for</span> <span class="n">subject</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">subjects</span><span class="p">():</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">subject</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>

        <span class="c"># endRDF</span>
        <span class="n">write</span><span class="p">(</span><span class="s">&quot;&lt;/rdf:RDF&gt;</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">)</span>

        <span class="c"># Set to None so that the memory can get garbage collected.</span>
        <span class="c"># self.__serialized = None</span>
        <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span>
</div>
<div class="viewcode-block" id="XMLSerializer.subject"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.XMLSerializer.subject">[docs]</a>    <span class="k">def</span> <span class="nf">subject</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">subject</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="mi">1</span><span class="p">):</span>
        <span class="k">if</span> <span class="ow">not</span> <span class="n">subject</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span><span class="p">:</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span><span class="p">[</span><span class="n">subject</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span>

            <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="p">(</span><span class="n">BNode</span><span class="p">,</span> <span class="n">URIRef</span><span class="p">)):</span>
                <span class="n">write</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">write</span>
                <span class="n">indent</span> <span class="o">=</span> <span class="s">&quot;  &quot;</span> <span class="o">*</span> <span class="n">depth</span>
                <span class="n">element_name</span> <span class="o">=</span> <span class="s">&quot;rdf:Description&quot;</span>

                <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">BNode</span><span class="p">):</span>
                    <span class="n">write</span><span class="p">(</span><span class="s">&#39;</span><span class="si">%s</span><span class="s">&lt;</span><span class="si">%s</span><span class="s"> rdf:nodeID=&quot;</span><span class="si">%s</span><span class="s">&quot;&#39;</span> <span class="o">%</span> <span class="p">(</span>
                        <span class="n">indent</span><span class="p">,</span> <span class="n">element_name</span><span class="p">,</span> <span class="n">subject</span><span class="p">))</span>
                <span class="k">else</span><span class="p">:</span>
                    <span class="n">uri</span> <span class="o">=</span> <span class="n">quoteattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">relativize</span><span class="p">(</span><span class="n">subject</span><span class="p">))</span>
                    <span class="n">write</span><span class="p">(</span><span class="s">&quot;</span><span class="si">%s</span><span class="s">&lt;</span><span class="si">%s</span><span class="s"> rdf:about=</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">indent</span><span class="p">,</span> <span class="n">element_name</span><span class="p">,</span> <span class="n">uri</span><span class="p">))</span>

                <span class="k">if</span> <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="p">:</span>
                    <span class="n">write</span><span class="p">(</span><span class="s">&quot;&gt;</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">)</span>

                    <span class="k">for</span> <span class="n">predicate</span><span class="p">,</span> <span class="nb">object</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">predicate_objects</span><span class="p">(</span>
                            <span class="n">subject</span><span class="p">):</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="nb">object</span><span class="p">,</span> <span class="n">depth</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>
                    <span class="n">write</span><span class="p">(</span><span class="s">&quot;</span><span class="si">%s</span><span class="s">&lt;/</span><span class="si">%s</span><span class="s">&gt;</span><span class="se">\n</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">indent</span><span class="p">,</span> <span class="n">element_name</span><span class="p">))</span>

                <span class="k">else</span><span class="p">:</span>
                    <span class="n">write</span><span class="p">(</span><span class="s">&quot;/&gt;</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="XMLSerializer.predicate"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.XMLSerializer.predicate">[docs]</a>    <span class="k">def</span> <span class="nf">predicate</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="nb">object</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="mi">1</span><span class="p">):</span>
        <span class="n">write</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">write</span>
        <span class="n">indent</span> <span class="o">=</span> <span class="s">&quot;  &quot;</span> <span class="o">*</span> <span class="n">depth</span>
        <span class="n">qname</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">namespace_manager</span><span class="o">.</span><span class="n">qname</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span>

        <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">Literal</span><span class="p">):</span>
            <span class="n">attributes</span> <span class="o">=</span> <span class="s">&quot;&quot;</span>

            <span class="k">if</span> <span class="nb">object</span><span class="o">.</span><span class="n">language</span><span class="p">:</span>
                <span class="n">attributes</span> <span class="o">+=</span> <span class="s">&#39; xml:lang=&quot;</span><span class="si">%s</span><span class="s">&quot;&#39;</span> <span class="o">%</span> <span class="nb">object</span><span class="o">.</span><span class="n">language</span>

            <span class="k">if</span> <span class="nb">object</span><span class="o">.</span><span class="n">datatype</span><span class="p">:</span>
                <span class="n">attributes</span> <span class="o">+=</span> <span class="s">&#39; rdf:datatype=&quot;</span><span class="si">%s</span><span class="s">&quot;&#39;</span> <span class="o">%</span> <span class="nb">object</span><span class="o">.</span><span class="n">datatype</span>

            <span class="n">write</span><span class="p">(</span><span class="s">&quot;</span><span class="si">%s</span><span class="s">&lt;</span><span class="si">%s%s</span><span class="s">&gt;</span><span class="si">%s</span><span class="s">&lt;/</span><span class="si">%s</span><span class="s">&gt;</span><span class="se">\n</span><span class="s">&quot;</span> <span class="o">%</span>
                  <span class="p">(</span><span class="n">indent</span><span class="p">,</span> <span class="n">qname</span><span class="p">,</span> <span class="n">attributes</span><span class="p">,</span>
                   <span class="n">escape</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">ESCAPE_ENTITIES</span><span class="p">),</span> <span class="n">qname</span><span class="p">))</span>
        <span class="k">else</span><span class="p">:</span>

            <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">BNode</span><span class="p">):</span>
                <span class="n">write</span><span class="p">(</span><span class="s">&#39;</span><span class="si">%s</span><span class="s">&lt;</span><span class="si">%s</span><span class="s"> rdf:nodeID=&quot;</span><span class="si">%s</span><span class="s">&quot;/&gt;</span><span class="se">\n</span><span class="s">&#39;</span> <span class="o">%</span>
                      <span class="p">(</span><span class="n">indent</span><span class="p">,</span> <span class="n">qname</span><span class="p">,</span> <span class="nb">object</span><span class="p">))</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="n">write</span><span class="p">(</span><span class="s">&quot;</span><span class="si">%s</span><span class="s">&lt;</span><span class="si">%s</span><span class="s"> rdf:resource=</span><span class="si">%s</span><span class="s">/&gt;</span><span class="se">\n</span><span class="s">&quot;</span> <span class="o">%</span>
                      <span class="p">(</span><span class="n">indent</span><span class="p">,</span> <span class="n">qname</span><span class="p">,</span> <span class="n">quoteattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">relativize</span><span class="p">(</span><span class="nb">object</span><span class="p">))))</span>
</div></div>
<span class="n">XMLLANG</span> <span class="o">=</span> <span class="s">&quot;http://www.w3.org/XML/1998/namespacelang&quot;</span>
<span class="n">XMLBASE</span> <span class="o">=</span> <span class="s">&quot;http://www.w3.org/XML/1998/namespacebase&quot;</span>
<span class="n">OWL_NS</span> <span class="o">=</span> <span class="n">Namespace</span><span class="p">(</span><span class="s">&#39;http://www.w3.org/2002/07/owl#&#39;</span><span class="p">)</span>


<span class="c"># TODO:</span>
<div class="viewcode-block" id="fix"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.fix">[docs]</a><span class="k">def</span> <span class="nf">fix</span><span class="p">(</span><span class="n">val</span><span class="p">):</span>
    <span class="s">&quot;strip off _: from nodeIDs... as they are not valid NCNames&quot;</span>
    <span class="k">if</span> <span class="n">val</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s">&quot;_:&quot;</span><span class="p">):</span>
        <span class="k">return</span> <span class="n">val</span><span class="p">[</span><span class="mi">2</span><span class="p">:]</span>
    <span class="k">else</span><span class="p">:</span>
        <span class="k">return</span> <span class="n">val</span>

</div>
<div class="viewcode-block" id="PrettyXMLSerializer"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.PrettyXMLSerializer">[docs]</a><span class="k">class</span> <span class="nc">PrettyXMLSerializer</span><span class="p">(</span><span class="n">Serializer</span><span class="p">):</span>

<div class="viewcode-block" id="PrettyXMLSerializer.__init__"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.PrettyXMLSerializer.__init__">[docs]</a>    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">store</span><span class="p">,</span> <span class="n">max_depth</span><span class="o">=</span><span class="mi">3</span><span class="p">):</span>
        <span class="nb">super</span><span class="p">(</span><span class="n">PrettyXMLSerializer</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="n">store</span><span class="p">)</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">forceRDFAbout</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
</div>
<div class="viewcode-block" id="PrettyXMLSerializer.serialize"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.PrettyXMLSerializer.serialize">[docs]</a>    <span class="k">def</span> <span class="nf">serialize</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">stream</span><span class="p">,</span> <span class="n">base</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">encoding</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="o">**</span><span class="n">args</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span> <span class="o">=</span> <span class="p">{}</span>
        <span class="n">store</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">base</span> <span class="o">=</span> <span class="n">base</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">max_depth</span> <span class="o">=</span> <span class="n">args</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">&quot;max_depth&quot;</span><span class="p">,</span> <span class="mi">3</span><span class="p">)</span>
        <span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_depth</span> <span class="o">&gt;</span> <span class="mi">0</span><span class="p">,</span> <span class="s">&quot;max_depth must be greater than 0&quot;</span>

        <span class="bp">self</span><span class="o">.</span><span class="n">nm</span> <span class="o">=</span> <span class="n">nm</span> <span class="o">=</span> <span class="n">store</span><span class="o">.</span><span class="n">namespace_manager</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">writer</span> <span class="o">=</span> <span class="n">writer</span> <span class="o">=</span> <span class="n">XMLWriter</span><span class="p">(</span><span class="n">stream</span><span class="p">,</span> <span class="n">nm</span><span class="p">,</span> <span class="n">encoding</span><span class="p">)</span>
        <span class="n">namespaces</span> <span class="o">=</span> <span class="p">{}</span>

        <span class="n">possible</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">store</span><span class="o">.</span><span class="n">predicates</span><span class="p">())</span><span class="o">.</span><span class="n">union</span><span class="p">(</span>
            <span class="n">store</span><span class="o">.</span><span class="n">objects</span><span class="p">(</span><span class="bp">None</span><span class="p">,</span> <span class="n">RDF</span><span class="o">.</span><span class="n">type</span><span class="p">))</span>

        <span class="k">for</span> <span class="n">predicate</span> <span class="ow">in</span> <span class="n">possible</span><span class="p">:</span>
            <span class="n">prefix</span><span class="p">,</span> <span class="n">namespace</span><span class="p">,</span> <span class="n">local</span> <span class="o">=</span> <span class="n">nm</span><span class="o">.</span><span class="n">compute_qname</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span>
            <span class="n">namespaces</span><span class="p">[</span><span class="n">prefix</span><span class="p">]</span> <span class="o">=</span> <span class="n">namespace</span>

        <span class="n">namespaces</span><span class="p">[</span><span class="s">&quot;rdf&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;http://www.w3.org/1999/02/22-rdf-syntax-ns#&quot;</span>

        <span class="n">writer</span><span class="o">.</span><span class="n">push</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">RDF</span><span class="p">)</span>

        <span class="k">if</span> <span class="s">&quot;xml_base&quot;</span> <span class="ow">in</span> <span class="n">args</span><span class="p">:</span>
            <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">XMLBASE</span><span class="p">,</span> <span class="n">args</span><span class="p">[</span><span class="s">&quot;xml_base&quot;</span><span class="p">])</span>

        <span class="n">writer</span><span class="o">.</span><span class="n">namespaces</span><span class="p">(</span><span class="n">namespaces</span><span class="o">.</span><span class="n">iteritems</span><span class="p">())</span>

        <span class="c"># Write out subjects that can not be inline</span>
        <span class="k">for</span> <span class="n">subject</span> <span class="ow">in</span> <span class="n">store</span><span class="o">.</span><span class="n">subjects</span><span class="p">():</span>
            <span class="k">if</span> <span class="p">(</span><span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="n">subject</span><span class="p">)</span> <span class="ow">in</span> <span class="n">store</span><span class="p">:</span>
                <span class="k">if</span> <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="n">subject</span><span class="p">)</span> <span class="ow">in</span> <span class="n">store</span><span class="p">:</span>
                    <span class="bp">self</span><span class="o">.</span><span class="n">subject</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">subject</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>

        <span class="c"># write out anything that has not yet been reached</span>
        <span class="c"># write out BNodes last (to ensure they can be inlined where possible)</span>
        <span class="n">bnodes</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>

        <span class="k">for</span> <span class="n">subject</span> <span class="ow">in</span> <span class="n">store</span><span class="o">.</span><span class="n">subjects</span><span class="p">():</span>
            <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">BNode</span><span class="p">):</span>
                <span class="n">bnodes</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">subject</span><span class="p">)</span>
                <span class="k">continue</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">subject</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>

        <span class="c"># now serialize only those BNodes that have not been serialized yet</span>
        <span class="k">for</span> <span class="n">bnode</span> <span class="ow">in</span> <span class="n">bnodes</span><span class="p">:</span>
            <span class="k">if</span> <span class="n">bnode</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span><span class="p">:</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">subject</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>

        <span class="n">writer</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">RDF</span><span class="p">)</span>
        <span class="n">stream</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">b</span><span class="p">(</span><span class="s">&quot;</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">))</span>

        <span class="c"># Set to None so that the memory can get garbage collected.</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span> <span class="o">=</span> <span class="bp">None</span>
</div>
<div class="viewcode-block" id="PrettyXMLSerializer.subject"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.PrettyXMLSerializer.subject">[docs]</a>    <span class="k">def</span> <span class="nf">subject</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">subject</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="mi">1</span><span class="p">):</span>
        <span class="n">store</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span>
        <span class="n">writer</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">writer</span>

        <span class="k">if</span> <span class="n">subject</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">forceRDFAbout</span><span class="p">:</span>
            <span class="n">writer</span><span class="o">.</span><span class="n">push</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">Description</span><span class="p">)</span>
            <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">about</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">relativize</span><span class="p">(</span><span class="n">subject</span><span class="p">))</span>
            <span class="n">writer</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">Description</span><span class="p">)</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">forceRDFAbout</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">subject</span><span class="p">)</span>

        <span class="k">elif</span> <span class="ow">not</span> <span class="n">subject</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span><span class="p">:</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span><span class="p">[</span><span class="n">subject</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span>
            <span class="nb">type</span> <span class="o">=</span> <span class="n">first</span><span class="p">(</span><span class="n">store</span><span class="o">.</span><span class="n">objects</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">RDF</span><span class="o">.</span><span class="n">type</span><span class="p">))</span>

            <span class="k">try</span><span class="p">:</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">nm</span><span class="o">.</span><span class="n">qname</span><span class="p">(</span><span class="nb">type</span><span class="p">)</span>
            <span class="k">except</span><span class="p">:</span>
                <span class="nb">type</span> <span class="o">=</span> <span class="bp">None</span>

            <span class="n">element</span> <span class="o">=</span> <span class="nb">type</span> <span class="ow">or</span> <span class="n">RDF</span><span class="o">.</span><span class="n">Description</span>
            <span class="n">writer</span><span class="o">.</span><span class="n">push</span><span class="p">(</span><span class="n">element</span><span class="p">)</span>

            <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">BNode</span><span class="p">):</span>
                <span class="k">def</span> <span class="nf">subj_as_obj_more_than</span><span class="p">(</span><span class="n">ceil</span><span class="p">):</span>
                    <span class="k">return</span> <span class="bp">True</span>
                    <span class="c"># more_than(store.triples((None, None, subject)), ceil)</span>

                <span class="c"># here we only include BNode labels if they are referenced</span>
                <span class="c"># more than once (this reduces the use of redundant BNode</span>
                <span class="c"># identifiers)</span>
                <span class="k">if</span> <span class="n">subj_as_obj_more_than</span><span class="p">(</span><span class="mi">1</span><span class="p">):</span>
                    <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">nodeID</span><span class="p">,</span> <span class="n">fix</span><span class="p">(</span><span class="n">subject</span><span class="p">))</span>

            <span class="k">else</span><span class="p">:</span>
                <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">about</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">relativize</span><span class="p">(</span><span class="n">subject</span><span class="p">))</span>

            <span class="k">if</span> <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span> <span class="ow">in</span> <span class="n">store</span><span class="p">:</span>
                <span class="k">for</span> <span class="n">predicate</span><span class="p">,</span> <span class="nb">object</span> <span class="ow">in</span> <span class="n">store</span><span class="o">.</span><span class="n">predicate_objects</span><span class="p">(</span><span class="n">subject</span><span class="p">):</span>
                    <span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">predicate</span> <span class="o">==</span> <span class="n">RDF</span><span class="o">.</span><span class="n">type</span> <span class="ow">and</span> <span class="nb">object</span> <span class="o">==</span> <span class="nb">type</span><span class="p">):</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">predicate</span><span class="p">(</span><span class="n">predicate</span><span class="p">,</span> <span class="nb">object</span><span class="p">,</span> <span class="n">depth</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>

            <span class="n">writer</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">element</span><span class="p">)</span>

        <span class="k">elif</span> <span class="n">subject</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">forceRDFAbout</span><span class="p">:</span>
            <span class="n">writer</span><span class="o">.</span><span class="n">push</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">Description</span><span class="p">)</span>
            <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">about</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">relativize</span><span class="p">(</span><span class="n">subject</span><span class="p">))</span>
            <span class="n">writer</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">Description</span><span class="p">)</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">forceRDFAbout</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">subject</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="PrettyXMLSerializer.predicate"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.serializers.html#rdflib.plugins.serializers.rdfxml.PrettyXMLSerializer.predicate">[docs]</a>    <span class="k">def</span> <span class="nf">predicate</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="nb">object</span><span class="p">,</span> <span class="n">depth</span><span class="o">=</span><span class="mi">1</span><span class="p">):</span>
        <span class="n">writer</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">writer</span>
        <span class="n">store</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span>
        <span class="n">writer</span><span class="o">.</span><span class="n">push</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span>

        <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">Literal</span><span class="p">):</span>
            <span class="k">if</span> <span class="nb">object</span><span class="o">.</span><span class="n">language</span><span class="p">:</span>
                <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">XMLLANG</span><span class="p">,</span> <span class="nb">object</span><span class="o">.</span><span class="n">language</span><span class="p">)</span>

            <span class="k">if</span> <span class="p">(</span><span class="nb">object</span><span class="o">.</span><span class="n">datatype</span> <span class="o">==</span> <span class="n">RDF</span><span class="o">.</span><span class="n">XMLLiteral</span> <span class="ow">and</span>
                    <span class="nb">isinstance</span><span class="p">(</span><span class="nb">object</span><span class="o">.</span><span class="n">value</span><span class="p">,</span> <span class="n">xml</span><span class="o">.</span><span class="n">dom</span><span class="o">.</span><span class="n">minidom</span><span class="o">.</span><span class="n">Document</span><span class="p">)):</span>
                <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">parseType</span><span class="p">,</span> <span class="s">&quot;Literal&quot;</span><span class="p">)</span>
                <span class="n">writer</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="s">u&quot;&quot;</span><span class="p">)</span>
                <span class="n">writer</span><span class="o">.</span><span class="n">stream</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="nb">object</span><span class="p">)</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="k">if</span> <span class="nb">object</span><span class="o">.</span><span class="n">datatype</span><span class="p">:</span>
                    <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">datatype</span><span class="p">,</span> <span class="nb">object</span><span class="o">.</span><span class="n">datatype</span><span class="p">)</span>
                <span class="n">writer</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="nb">object</span><span class="p">)</span>

        <span class="k">elif</span> <span class="nb">object</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span> <span class="ow">or</span> <span class="ow">not</span> <span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span> <span class="ow">in</span> <span class="n">store</span><span class="p">:</span>

            <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">BNode</span><span class="p">):</span>
                <span class="k">if</span> <span class="n">more_than</span><span class="p">(</span><span class="n">store</span><span class="o">.</span><span class="n">triples</span><span class="p">((</span><span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="nb">object</span><span class="p">)),</span> <span class="mi">0</span><span class="p">):</span>
                    <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">nodeID</span><span class="p">,</span> <span class="n">fix</span><span class="p">(</span><span class="nb">object</span><span class="p">))</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">resource</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">relativize</span><span class="p">(</span><span class="nb">object</span><span class="p">))</span>

        <span class="k">else</span><span class="p">:</span>
            <span class="k">if</span> <span class="n">first</span><span class="p">(</span><span class="n">store</span><span class="o">.</span><span class="n">objects</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">RDF</span><span class="o">.</span><span class="n">first</span><span class="p">)):</span>  <span class="c"># may not have type</span>
                                                         <span class="c"># RDF.List</span>

                <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span><span class="p">[</span><span class="nb">object</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span>

                <span class="c"># Warn that any assertions on object other than</span>
                <span class="c"># RDF.first and RDF.rest are ignored... including RDF.List</span>
                <span class="kn">import</span> <span class="nn">warnings</span>
                <span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span>
                    <span class="s">&quot;Assertions on </span><span class="si">%s</span><span class="s"> other than RDF.first &quot;</span> <span class="o">%</span> <span class="nb">repr</span><span class="p">(</span><span class="nb">object</span><span class="p">)</span> <span class="o">+</span>
                    <span class="s">&quot;and RDF.rest are ignored ... including RDF.List&quot;</span><span class="p">,</span>
                    <span class="ne">UserWarning</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
                <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">parseType</span><span class="p">,</span> <span class="s">&quot;Collection&quot;</span><span class="p">)</span>

                <span class="n">col</span> <span class="o">=</span> <span class="n">Collection</span><span class="p">(</span><span class="n">store</span><span class="p">,</span> <span class="nb">object</span><span class="p">)</span>

                <span class="k">for</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">col</span><span class="p">:</span>

                    <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">item</span><span class="p">,</span> <span class="n">URIRef</span><span class="p">):</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">forceRDFAbout</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">item</span><span class="p">)</span>
                    <span class="bp">self</span><span class="o">.</span><span class="n">subject</span><span class="p">(</span><span class="n">item</span><span class="p">)</span>

                    <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">item</span><span class="p">,</span> <span class="n">URIRef</span><span class="p">):</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span><span class="p">[</span><span class="n">item</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="k">if</span> <span class="n">first</span><span class="p">(</span><span class="n">store</span><span class="o">.</span><span class="n">triples_choices</span><span class="p">(</span>
                    <span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">RDF</span><span class="o">.</span><span class="n">type</span><span class="p">,</span> <span class="p">[</span><span class="n">OWL_NS</span><span class="o">.</span><span class="n">Class</span><span class="p">,</span> <span class="n">RDFS</span><span class="o">.</span><span class="n">Class</span><span class="p">])))</span> \
                        <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">URIRef</span><span class="p">):</span>
                    <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">resource</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">relativize</span><span class="p">(</span><span class="nb">object</span><span class="p">))</span>

                <span class="k">elif</span> <span class="n">depth</span> <span class="o">&lt;=</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_depth</span><span class="p">:</span>
                    <span class="bp">self</span><span class="o">.</span><span class="n">subject</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">depth</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>

                <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">BNode</span><span class="p">):</span>

                    <span class="k">if</span> <span class="ow">not</span> <span class="nb">object</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__serialized</span> \
                            <span class="ow">and</span> <span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span> <span class="ow">in</span> <span class="n">store</span> \
                            <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="n">store</span><span class="o">.</span><span class="n">subjects</span><span class="p">(</span><span class="nb">object</span><span class="o">=</span><span class="nb">object</span><span class="p">)))</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
                        <span class="c"># inline blank nodes if they haven&#39;t been serialized yet</span>
                        <span class="c"># and are only referenced once (regardless of depth)</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">subject</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">depth</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>
                    <span class="k">else</span><span class="p">:</span>
                        <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">nodeID</span><span class="p">,</span> <span class="n">fix</span><span class="p">(</span><span class="nb">object</span><span class="p">))</span>

                <span class="k">else</span><span class="p">:</span>
                    <span class="n">writer</span><span class="o">.</span><span class="n">attribute</span><span class="p">(</span><span class="n">RDF</span><span class="o">.</span><span class="n">resource</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">relativize</span><span class="p">(</span><span class="nb">object</span><span class="p">))</span>

        <span class="n">writer</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">predicate</span><span class="p">)</span></div></div>
</pre></div>

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