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Relevant Search: With Applications for Solr and Elasticsearch

For more in depth reading about search, ranking and generally everything you could ever want to know about how lucene, elasticsearch or solr work under the hood I highly suggest this book. Easily one of the most interesting technical books I have read in a long time. If you are tasked with solving search relevance problems even if not in Solr or Elasticsearch it should be your first reference. Amazon Affiliate Link
https://bitbucket.org/Naked_Yoshi/sq_kanban
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295<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
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311<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
312<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
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314<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
315<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
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317<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
318<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
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351<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
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355<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
356<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
357<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
358<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
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425  <div class="section" id="downloading-codeigniter">
426<h1>Downloading CodeIgniter<a class="headerlink" href="#downloading-codeigniter" title="Permalink to this headline"></a></h1>
427<ul class="simple">
428<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.1.6">CodeIgniter v3.1.6 (Current version)</a></li>
429<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.1.5">CodeIgniter v3.1.5</a></li>
430<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.1.4">CodeIgniter v3.1.4</a></li>
431<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.1.3">CodeIgniter v3.1.3</a></li>
432<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.1.2">CodeIgniter v3.1.2</a></li>
433<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.1.1">CodeIgniter v3.1.1</a></li>
434<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.1.0">CodeIgniter v3.1.0</a></li>
435<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.0.6">CodeIgniter v3.0.6</a></li>
436<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.0.5">CodeIgniter v3.0.5</a></li>
437<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.0.4">CodeIgniter v3.0.4</a></li>
438<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.0.3">CodeIgniter v3.0.3</a></li>
439<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.0.2">CodeIgniter v3.0.2</a></li>
440<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.0.1">CodeIgniter v3.0.1</a></li>
441<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/3.0.0">CodeIgniter v3.0.0</a></li>
442<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/2.2.3">CodeIgniter v2.2.3</a></li>
443<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/2.2.2">CodeIgniter v2.2.2</a></li>
444<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/2.2.1">CodeIgniter v2.2.1</a></li>
445<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/2.2.0">CodeIgniter v2.2.0</a></li>
446<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/2.1.4">CodeIgniter v2.1.4</a></li>
447<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/2.1.3">CodeIgniter v2.1.3</a></li>
448<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/2.1.2">CodeIgniter v2.1.2</a></li>
449<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/2.1.1">CodeIgniter v2.1.1</a></li>
450<li><a class="reference external" href="https://codeload.github.com/bcit-ci/CodeIgniter/zip/v2.1.0">CodeIgniter v2.1.0</a></li>
451</ul>
452<div class="section" id="github">
453<h2>GitHub<a class="headerlink" href="#github" title="Permalink to this headline"></a></h2>
454<p><a class="reference external" href="http://git-scm.com/about">Git</a> is a distributed version control system.</p>
455<p>Public Git access is available at <a class="reference external" href="https://github.com/bcit-ci/CodeIgniter">GitHub</a>.
456Please note that while every effort is made to keep this code base
457functional, we cannot guarantee the functionality of code taken from
458the develop branch.</p>
459<p>Beginning with version 2.0.3, stable versions are also available via <a class="reference external" href="https://github.com/bcit-ci/CodeIgniter/releases">GitHub Releases</a>.</p>
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