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 <li class="level-2"><a class="final" 
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Variants</span></a></li><li class="level-2"><a class="final" 
href="/deploy/plugin/"><span>Engine Server Plugin</span></a></li></ul></li><li 
class="level-1"><a class="expandible" href="#"><span>Customizing an 
Engine</span></a><ul><li class="level-2"><a class="final" 
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class="final" href="/customize/dase/"><span>Implement DASE</span></a></li><li 
class="level-2"><a class="final" 
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 >Choosing Evaluation Metrics</span></a></li><li class="level-2"><a 
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 >Start</span></a></li><li class="level-3"><a class="final" 
 >href="/templates/recommendation/dase/"><span>DASE</span></a></li><li 
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 class="final" href="/templates/recommendation/evaluation/"><span>Evaluation 
Explained</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/how-to/"><span>How-To</span></a></li><li 
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Start</span></a></li
 ><li class="level-3"><a class="final" 
 >href="/templates/similarproduct/dase/"><span>DASE</span></a></li><li 
 >class="level-3"><a class="final" 
 >href="/templates/similarproduct/how-to/"><span>How-To</span></a></li><li 
 >class="level-3"><a class="final" 
 >href="/templates/similarproduct/multi-events-multi-algos/"><span>Multiple 
 >Events and Multiple Algorithms</span></a></li><li class="level-3"><a 
 >class="final" 
 >href="/templates/similarproduct/return-item-properties/"><span>Returns Item 
 >Properties</span></a></li><li class="level-3"><a class="final" 
 >href="/templates/similarproduct/train-with-rate-event/"><span>Train with Rate 
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 >href="/templates/similarproduct/rid-user-set-event/"><span>Get Rid of Events 
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 >href="/templates/similarproduct/recommended-user/"><span>Recommend 
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 >href="#"><span>Classification</span></a>
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Start</span></a></li><li class="level-3"><a class="final" 
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id="page-title"><h1>Built-in Algorithm Libraries</h1></div></div><div 
class="content"> <p>An engine can virtually call any algorithm in the Algorithm 
class. Apache PredictionIO currently offers native support to <a 
href="http://spark.apache.org/docs/latest/mllib-guide.html";>Spark MLlib</a> 
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