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<section id="linked-data-platform">
<span id="index-0"></span><h1>Linked Data Platform<a class="headerlink" href="#linked-data-platform" title="Permalink to this heading">#</a></h1>
<section id="containers">
<span id="index-1"></span><h2>Containers<a class="headerlink" href="#containers" title="Permalink to this heading">#</a></h2>
<p><a class="reference external" href="https://www.w3.org/TR/ldp/#ldpc">https://www.w3.org/TR/ldp/#ldpc</a></p>
<p>We extend the notion of LDP containers!</p>
<p>Terms:</p>
<ul class="simple">
<li><p>Containment Triples</p></li>
<li><p>Membership Triples</p></li>
</ul>
<p>Types:</p>
<ul class="simple">
<li><p>Direct Containers</p></li>
</ul>
<div class="highlight-turtle notranslate"><div class="highlight"><pre><span></span><span class="k">@prefix</span><span class="w"> </span><span class="nn">dcterms:</span><span class="w"> </span><span class="nv">&lt;http://purl.org/dc/terms/&gt;</span><span class="p">.</span>
<span class="k">@prefix</span><span class="w"> </span><span class="nn">ldp:</span><span class="w"> </span><span class="nv">&lt;http://www.w3.org/ns/ldp#&gt;</span><span class="p">.</span>
<span class="nv">&lt;http://example.org/c1/&gt;</span>
<span class="kt">a</span> <span class="nn">ldp</span><span class="p">:</span><span class="nt">BasicContainer</span><span class="p">;</span>
<span class="nn">dcterms</span><span class="p">:</span><span class="nt">title</span> <span class="s">&quot;A very simple container&quot;</span><span class="p">;</span>
<span class="nn">ldp</span><span class="p">:</span><span class="nt">contains</span> <span class="nv">&lt;r1&gt;</span><span class="p">,</span> <span class="nv">&lt;r2&gt;</span><span class="p">,</span> <span class="nv">&lt;r3&gt;</span><span class="p">.</span>
</pre></div>
</div>
<ul class="simple">
<li><p>Indirect Containers - a way of interacting with existing data</p></li>
</ul>
<p>Given:</p>
<div class="highlight-turtle notranslate"><div class="highlight"><pre><span></span><span class="k">@prefix</span><span class="w"> </span><span class="nn">ldp:</span><span class="w"> </span><span class="nv">&lt;http://www.w3.org/ns/ldp#&gt;</span><span class="p">.</span>
<span class="k">@prefix</span><span class="w"> </span><span class="nn">o:</span><span class="w"> </span><span class="nv">&lt;http://example.org/ontology#&gt;</span><span class="p">.</span>
<span class="nv">&lt;http://example.org/netWorth/nw1/&gt;</span>
<span class="kt">a</span> <span class="nn">o</span><span class="p">:</span><span class="nt">NetWorth</span><span class="p">;</span>
<span class="nn">o</span><span class="p">:</span><span class="nt">netWorthOf</span> <span class="nv">&lt;http://example.org/users/JohnZSmith&gt;</span><span class="p">;</span>
<span class="nn">o</span><span class="p">:</span><span class="nt">asset</span>
<span class="nv">&lt;assets/a1&gt;</span><span class="p">,</span>
<span class="nv">&lt;assets/a2&gt;</span><span class="p">;</span>
<span class="nn">o</span><span class="p">:</span><span class="nt">liability</span>
<span class="nv">&lt;liabilities/l1&gt;</span><span class="p">,</span>
<span class="nv">&lt;liabilities/l2&gt;</span><span class="p">,</span>
<span class="nv">&lt;liabilities/l3&gt;</span><span class="p">.</span>
</pre></div>
</div>
<p>we can make direct containers that describe the assets and liabilities as containers without modifying the original data</p>
<div class="highlight-turtle notranslate"><div class="highlight"><pre><span></span><span class="k">@prefix</span><span class="w"> </span><span class="nn">ldp:</span><span class="w"> </span><span class="nv">&lt;http://www.w3.org/ns/ldp#&gt;</span><span class="p">.</span>
<span class="k">@prefix</span><span class="w"> </span><span class="nn">dcterms:</span><span class="w"> </span><span class="nv">&lt;http://purl.org/dc/terms/&gt;</span><span class="p">.</span>
<span class="k">@prefix</span><span class="w"> </span><span class="nn">o:</span><span class="w"> </span><span class="nv">&lt;http://example.org/ontology#&gt;</span><span class="p">.</span>
<span class="nv">&lt;http://example.org/netWorth/nw1/assets/&gt;</span>
<span class="kt">a</span> <span class="nn">ldp</span><span class="p">:</span><span class="nt">DirectContainer</span><span class="p">;</span>
<span class="nn">dcterms</span><span class="p">:</span><span class="nt">title</span> <span class="s">&quot;The assets of JohnZSmith&quot;</span><span class="p">;</span>
<span class="nn">ldp</span><span class="p">:</span><span class="nt">membershipResource</span> <span class="nv">&lt;http://example.org/netWorth/nw1/&gt;</span><span class="p">;</span>
<span class="nn">ldp</span><span class="p">:</span><span class="nt">hasMemberRelation</span> <span class="nn">o</span><span class="p">:</span><span class="nt">asset</span><span class="p">;</span>
<span class="nn">ldp</span><span class="p">:</span><span class="nt">contains</span> <span class="nv">&lt;a1&gt;</span><span class="p">,</span> <span class="nv">&lt;a2&gt;</span><span class="p">.</span>
</pre></div>
</div>
<p>Additionally, if one were to add a new set of “advisors,” we would make an indirect container that tells us we need an additional triple when creating new members of the container (<code class="docutils literal notranslate"><span class="pre">foaf:primaryTopic</span></code>):</p>
<div class="highlight-turtle notranslate"><div class="highlight"><pre><span></span><span class="nv">&lt;advisors/&gt;</span>
<span class="kt">a</span> <span class="nn">ldp</span><span class="p">:</span><span class="nt">IndirectContainer</span><span class="p">;</span>
<span class="nn">dcterms</span><span class="p">:</span><span class="nt">title</span> <span class="s">&quot;The asset advisors of JohnZSmith&quot;</span><span class="p">;</span>
<span class="nn">ldp</span><span class="p">:</span><span class="nt">membershipResource</span> <span class="nv">&lt;&gt;</span><span class="p">;</span>
<span class="nn">ldp</span><span class="p">:</span><span class="nt">hasMemberRelation</span> <span class="nn">o</span><span class="p">:</span><span class="nt">advisor</span><span class="p">;</span>
<span class="nn">ldp</span><span class="p">:</span><span class="nt">insertedContentRelation</span> <span class="nn">foaf</span><span class="p">:</span><span class="nt">primaryTopic</span><span class="p">;</span>
<span class="nn">ldp</span><span class="p">:</span><span class="nt">contains</span>
<span class="nv">&lt;advisors/bob&gt;</span><span class="p">,</span> <span class="c"># URI of a document a.k.a. an information resource</span>
<span class="nv">&lt;advisors/marsha&gt;</span><span class="p">.</span> <span class="c"># describing a person</span>
</pre></div>
</div>
<p>(still unclear to me what is different about that, still reading.)</p>
<div class="table-wrapper colwidths-auto docutils container">
<table class="docutils align-default">
<thead>
<tr class="row-odd"><th class="head"><p>Completed Request</p></th>
<th class="head"><p>Membership Effect</p></th>
<th class="head"><p>Containment Effect</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>Create in Basic Container</p></td>
<td><p>New triple: (LDPC, ldp:contains, LDPR)</p></td>
<td><p>Same</p></td>
</tr>
<tr class="row-odd"><td><p>Create in Direct Container</p></td>
<td><p>New triple links LDP-RS to created LDPR. LDP-RS URI may be same as LDP-DC</p></td>
<td><p>New triple: (LDPC, ldp:contains, LDPR)</p></td>
</tr>
<tr class="row-even"><td><p>Create in Indirect Container</p></td>
<td><p>New triple links LDP-RS to content indicated URI</p></td>
<td><p>New triple: (LDPC, ldp:contains, LDPR)</p></td>
</tr>
<tr class="row-odd"><td><p>Resource deleted</p></td>
<td><p>Membership triple may be removed</p></td>
<td><p>(LDPC, ldp:contains, LDPR) triple is removed</p></td>
</tr>
<tr class="row-even"><td><p>Container deleted</p></td>
<td><p>Triples and member resources may be removed</p></td>
<td><p>Triples of form (LDPC, ldp:contains, LDPR) and contained LDPRs may be removed</p></td>
</tr>
</tbody>
</table>
</div>
</section>
<section id="similarities">
<h2>Similarities<a class="headerlink" href="#similarities" title="Permalink to this heading">#</a></h2>
<ul class="simple">
<li><p>Separation between container data and metadata - “minimal-container triples,” what remains in the container when the container has zero members and zero contained resources</p></li>
</ul>
</section>
<section id="differences">
<h2>Differences<a class="headerlink" href="#differences" title="Permalink to this heading">#</a></h2>
<ul class="simple">
<li><p>Containers are not recursive??or at least that is suggested by the net worth example that explains why we cant just turn the original subject into a container: “cant mix assets and liabilities” and i am like why not make one container for the person and then subcontainers for each of the types?</p></li>
</ul>
</section>
<section id="references">
<h2>References<a class="headerlink" href="#references" title="Permalink to this heading">#</a></h2>
<ul class="simple">
<li><p>Spec: <a class="reference external" href="https://www.w3.org/TR/ldp/">https://www.w3.org/TR/ldp/</a></p></li>
<li><p>Use cases and requirements: <a class="reference external" href="https://www.w3.org/TR/ldp-ucr/">https://www.w3.org/TR/ldp-ucr/</a></p></li>
<li><p>eg. using virtuoso. <a class="reference external" href="https://github.com/vemonet/virtuoso-ldp">https://github.com/vemonet/virtuoso-ldp</a></p></li>
</ul>
</section>
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