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<div class="section" id="upgrading-from-rdflib-version-2-x-to-3-x">
<h1>Upgrading from RDFLib version 2.X to 3.X<a class="headerlink" href="#upgrading-from-rdflib-version-2-x-to-3-x" title="Permalink to this headline">¶</a></h1>
<div class="section" id="introduction">
<h2>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline">¶</a></h2>
<p>This page details the changes required to upgrade from RDFLib 2.X to 3.X.</p>
<p>Some older Linux distributions still ship 2.4.X. If needed, you can also install 2.4 using easy_install/setup tools.</p>
<p>Version 3.0 reorganised some packages, and moved non-core parts of rdflib to the <a class="reference external" href="http://code.google.com/p/rdfextras/">rdfextras project</a></p>
</div>
<div class="section" id="features-moved-to-rdfextras">
<h2>Features moved to rdfextras<a class="headerlink" href="#features-moved-to-rdfextras" title="Permalink to this headline">¶</a></h2>
<blockquote>
<div><ul class="simple">
<li>SPARQL Support is now in rdfextras / rdflib-sparql</li>
<li>The RDF Commandline tools are now in rdfextras</li>
</ul>
</div></blockquote>
<div class="admonition warning">
<p class="first admonition-title">Warning</p>
<p>If you install packages with just distutils - you will need to register the sparql plugins manually - we strongly recommend installing with setuptools or distribute!
To register the plugins add this somewhere in your program:</p>
<div class="last highlight-python"><div class="highlight"><pre><span class="n">rdflib</span><span class="o">.</span><span class="n">plugin</span><span class="o">.</span><span class="n">register</span><span class="p">(</span><span class="s">'sparql'</span><span class="p">,</span> <span class="n">rdflib</span><span class="o">.</span><span class="n">query</span><span class="o">.</span><span class="n">Processor</span><span class="p">,</span>
<span class="s">'rdfextras.sparql.processor'</span><span class="p">,</span> <span class="s">'Processor'</span><span class="p">)</span>
<span class="n">rdflib</span><span class="o">.</span><span class="n">plugin</span><span class="o">.</span><span class="n">register</span><span class="p">(</span><span class="s">'sparql'</span><span class="p">,</span> <span class="n">rdflib</span><span class="o">.</span><span class="n">query</span><span class="o">.</span><span class="n">Result</span><span class="p">,</span>
<span class="s">'rdfextras.sparql.query'</span><span class="p">,</span> <span class="s">'SPARQLQueryResult'</span><span class="p">)</span>
</pre></div>
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<div class="section" id="unstable-features-that-were-removed">
<h2>Unstable features that were removed<a class="headerlink" href="#unstable-features-that-were-removed" title="Permalink to this headline">¶</a></h2>
<blockquote>
<div>The RDBMS back stores (MySQL/PostgreSQL) were removed, but are in the process of being moved to rdfextras. The Redland, SQLite and ZODB stores were all removed.</div></blockquote>
</div>
<div class="section" id="packages-classes-that-were-renamed">
<h2>Packages/Classes that were renamed<a class="headerlink" href="#packages-classes-that-were-renamed" title="Permalink to this headline">¶</a></h2>
<p>Previously all packages and classes had colliding names, i.e. both package and the class was called “Graph”:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">rdflib.Graph</span> <span class="kn">import</span> <span class="n">Graph</span><span class="p">,</span> <span class="n">ConjunctiveGraph</span>
</pre></div>
</div>
<p>Now all packages are lower-case, i.e:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">rdflib.graph</span> <span class="kn">import</span> <span class="n">Graph</span><span class="p">,</span> <span class="n">ConjunctiveGraph</span>
</pre></div>
</div>
<p>Most classes you need are available from the top level rdflib package:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">Graph</span><span class="p">,</span> <span class="n">URIRef</span><span class="p">,</span> <span class="n">BNode</span><span class="p">,</span> <span class="n">Literal</span>
</pre></div>
</div>
<p>Namespace classes for RDF, RDFS, OWL are now directly in the rdflib package, i.e. in 2.4:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">rdflib.RDF</span> <span class="kn">import</span> <span class="n">RDFNS</span> <span class="k">as</span> <span class="n">RDF</span>
</pre></div>
</div>
<p>in 3.0:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">RDF</span>
</pre></div>
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<h3><a href="index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">Upgrading from RDFLib version 2.X to 3.X</a><ul>
<li><a class="reference internal" href="#introduction">Introduction</a></li>
<li><a class="reference internal" href="#features-moved-to-rdfextras">Features moved to rdfextras</a></li>
<li><a class="reference internal" href="#unstable-features-that-were-removed">Unstable features that were removed</a></li>
<li><a class="reference internal" href="#packages-classes-that-were-renamed">Packages/Classes that were renamed</a></li>
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