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<section id="linked-data-platform">
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<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"><http://purl.org/dc/terms/></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"><http://www.w3.org/ns/ldp#></span><span class="p">.</span>
|
||
|
||
<span class="nv"><http://example.org/c1/></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">"A very simple container"</span><span class="p">;</span>
|
||
<span class="nn">ldp</span><span class="p">:</span><span class="nt">contains</span> <span class="nv"><r1></span><span class="p">,</span> <span class="nv"><r2></span><span class="p">,</span> <span class="nv"><r3></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"><http://www.w3.org/ns/ldp#></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"><http://example.org/ontology#></span><span class="p">.</span>
|
||
|
||
<span class="nv"><http://example.org/netWorth/nw1/></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"><http://example.org/users/JohnZSmith></span><span class="p">;</span>
|
||
<span class="nn">o</span><span class="p">:</span><span class="nt">asset</span>
|
||
<span class="nv"><assets/a1></span><span class="p">,</span>
|
||
<span class="nv"><assets/a2></span><span class="p">;</span>
|
||
<span class="nn">o</span><span class="p">:</span><span class="nt">liability</span>
|
||
<span class="nv"><liabilities/l1></span><span class="p">,</span>
|
||
<span class="nv"><liabilities/l2></span><span class="p">,</span>
|
||
<span class="nv"><liabilities/l3></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"><http://www.w3.org/ns/ldp#></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"><http://purl.org/dc/terms/></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"><http://example.org/ontology#></span><span class="p">.</span>
|
||
|
||
<span class="nv"><http://example.org/netWorth/nw1/assets/></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">"The assets of JohnZSmith"</span><span class="p">;</span>
|
||
<span class="nn">ldp</span><span class="p">:</span><span class="nt">membershipResource</span> <span class="nv"><http://example.org/netWorth/nw1/></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"><a1></span><span class="p">,</span> <span class="nv"><a2></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"><advisors/></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">"The asset advisors of JohnZSmith"</span><span class="p">;</span>
|
||
<span class="nn">ldp</span><span class="p">:</span><span class="nt">membershipResource</span> <span class="nv"><></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"><advisors/bob></span><span class="p">,</span> <span class="c"># URI of a document a.k.a. an information resource</span>
|
||
<span class="nv"><advisors/marsha></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 can’t just turn the original subject into a container: “can’t 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>
|
||
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|
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