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<title>Parallel BGL Concept Distributed Edge List Graph</title>
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<h1 class="title"><a class="reference external" href="http://www.osl.iu.edu/research/pbgl"><img align="middle" alt="Parallel BGL" class="align-middle" src="pbgl-logo.png" /></a> Concept Distributed Edge List Graph</h1>

<!-- Copyright (C) 2004-2008 The Trustees of Indiana University.
Use, modification and distribution is subject to the Boost Software
License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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<div class="contents topic" id="contents">
<p class="topic-title first">Contents</p>
<ul class="simple">
<li><a class="reference internal" href="#description" id="id1">Description</a></li>
<li><a class="reference internal" href="#notation" id="id2">Notation</a></li>
<li><a class="reference internal" href="#refinement-of" id="id3">Refinement of</a></li>
<li><a class="reference internal" href="#associated-types" id="id4">Associated types</a></li>
<li><a class="reference internal" href="#valid-expressions" id="id5">Valid Expressions</a></li>
<li><a class="reference internal" href="#models" id="id6">Models</a></li>
</ul>
</div>
<div class="section" id="description">
<h1><a class="toc-backref" href="#id1">Description</a></h1>
<p>A Distributed Edge List Graph is a graph whose vertices are
distributed across multiple processes or address spaces. The
<tt class="docutils literal"><span class="pre">vertices</span></tt> and <tt class="docutils literal"><span class="pre">num_vertices</span></tt> functions retain the same
signatures as in the <a class="reference external" href="http://www.boost.org/libs/graph/doc/EdgeListGraph.html">Edge List Graph</a> concept, but return only
the local set (and size of the local set) of vertices.</p>
</div>
<div class="section" id="notation">
<h1><a class="toc-backref" href="#id2">Notation</a></h1>
<dl class="docutils">
<dt>G</dt>
<dd>A type that models the Distributed Edge List Graph concept.</dd>
<dt>g</dt>
<dd>An object of type <tt class="docutils literal"><span class="pre">G</span></tt>.</dd>
</dl>
</div>
<div class="section" id="refinement-of">
<h1><a class="toc-backref" href="#id3">Refinement of</a></h1>
<blockquote>
<ul class="simple">
<li><a class="reference external" href="http://www.boost.org/libs/graph/doc/Graph.html">Graph</a></li>
</ul>
</blockquote>
</div>
<div class="section" id="associated-types">
<h1><a class="toc-backref" href="#id4">Associated types</a></h1>
<table border="1" class="docutils">
<colgroup>
<col width="18%" />
<col width="44%" />
<col width="38%" />
</colgroup>
<tbody valign="top">
<tr><td>Edge
descriptor type</td>
<td><tt class="docutils literal"><span class="pre">graph_traits&lt;G&gt;::edge_descriptor</span></tt></td>
<td>Must model the
<a class="reference external" href="GlobalDescriptor.html">Global Descriptor</a> concept.</td>
</tr>
<tr><td>Edge iterator
type</td>
<td><tt class="docutils literal"><span class="pre">graph_traits&lt;G&gt;::edge_iterator</span></tt></td>
<td>Iterates over edges stored
locally. The value type must be
<tt class="docutils literal"><span class="pre">edge_descriptor</span></tt>.</td>
</tr>
<tr><td>Edges size
type</td>
<td><tt class="docutils literal"><span class="pre">graph_traits&lt;G&gt;::edges_size_type</span></tt></td>
<td>The unsigned integral type used
to store the number of edges
in the local subgraph.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="valid-expressions">
<h1><a class="toc-backref" href="#id5">Valid Expressions</a></h1>
<table border="1" class="docutils">
<colgroup>
<col width="17%" />
<col width="22%" />
<col width="23%" />
<col width="39%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head">Name</th>
<th class="head">Expression</th>
<th class="head">Type</th>
<th class="head">Semantics</th>
</tr>
</thead>
<tbody valign="top">
<tr><td>Local edge set</td>
<td><tt class="docutils literal"><span class="pre">edges(g)</span></tt></td>
<td><tt class="docutils literal"><span class="pre">std::pair&lt;</span></tt>
<tt class="docutils literal"><span class="pre">edge_iterator,</span></tt>
<tt class="docutils literal"><span class="pre">edge_iterator&gt;</span></tt></td>
<td>Returns an iterator range
providing access to the local
edges in the graph.</td>
</tr>
<tr><td>Number of local
edges.</td>
<td><tt class="docutils literal"><span class="pre">num_edges(g)</span></tt></td>
<td><tt class="docutils literal"><span class="pre">edges_size_type</span></tt></td>
<td>Returns the number of edges
stored locally in the graph.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="models">
<h1><a class="toc-backref" href="#id6">Models</a></h1>
<blockquote>
<ul class="simple">
<li><a class="reference external" href="distributed_adjacency_list.html">Distributed adjacency list</a></li>
</ul>
</blockquote>
<hr class="docutils" />
<p>Copyright (C) 2005 The Trustees of Indiana University.</p>
<p>Authors: Douglas Gregor and Andrew Lumsdaine</p>
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