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-<!DOCTYPE html><html><head><title>Sample Style Page</title><meta 
charset="utf-8"/><meta content="IE=edge,chrome=1" 
http-equiv="X-UA-Compatible"/><meta name="viewport" 
content="width=device-width, initial-scale=1.0"/><meta class="swiftype" 
name="title" data-type="string" content="Sample Style Page"/><link 
rel="canonical" href="https://predictionio.apache.org/samples/"/><link 
href="/images/favicon/normal-b330020a.png" rel="shortcut icon"/><link 
href="/images/favicon/apple-c0febcf2.png" rel="apple-touch-icon"/><link 
href="//fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800"
 rel="stylesheet"/><link 
href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" 
rel="stylesheet"/><link href="/stylesheets/application-eccfc6cb.css" 
rel="stylesheet" type="text/css"/><script 
src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.2/html5shiv.min.js"></script><script
 src="//cdn.mathjax.org/mathjax/latest/MathJax.js?config=
 TeX-AMS-MML_HTMLorMML"></script><script 
src="//use.typekit.net/pqo0itb.js"></script><script>try{Typekit.load({ async: 
true });}catch(e){}</script></head><body><div id="global"><header><div 
class="container" id="header-wrapper"><div class="row"><div 
class="col-sm-12"><div id="logo-wrapper"><span id="drawer-toggle"></span><a 
href="#"></a><a href="http://predictionio.apache.org/";><img alt="Apache 
PredictionIO" id="logo" 
src="/images/logos/logo-ee2b9bb3.png"/></a><span>®</span></div><div 
id="menu-wrapper"><div id="pill-wrapper"><a class="pill left" 
href="/gallery/template-gallery">TEMPLATES</a> <a class="pill right" 
href="//github.com/apache/incubator-predictionio/">OPEN 
SOURCE</a></div></div><img class="mobile-search-bar-toggler hidden-md 
hidden-lg" 
src="/images/icons/search-glass-704bd4ff.png"/></div></div></div></header><div 
id="search-bar-row-wrapper"><div class="container-fluid" 
id="search-bar-row"><div class="row"><div class="col-md-9 col-sm-11 
col-xs-11"><div class="hidden-md hi
 dden-lg" id="mobile-page-heading-wrapper"><p>PredictionIO Docs</p><h4>Sample 
Style Page</h4></div><h4 class="hidden-sm hidden-xs">PredictionIO 
Docs</h4></div><div class="col-md-3 col-sm-1 col-xs-1 hidden-md hidden-lg"><img 
id="left-menu-indicator" 
src="/images/icons/down-arrow-dfe9f7fe.png"/></div><div class="col-md-3 
col-sm-12 col-xs-12 swiftype-wrapper"><div class="swiftype"><form 
class="search-form"><img class="search-box-toggler hidden-xs hidden-sm" 
src="/images/icons/search-glass-704bd4ff.png"/><div class="search-box"><img 
src="/images/icons/search-glass-704bd4ff.png"/><input type="text" 
id="st-search-input" class="st-search-input" placeholder="Search 
Doc..."/></div><img class="swiftype-row-hider hidden-md hidden-lg" 
src="/images/icons/drawer-toggle-active-fcbef12a.png"/></form></div></div><div 
class="mobile-left-menu-toggler hidden-md 
hidden-lg"></div></div></div></div><div id="page" class="container-fluid"><div 
class="row"><div id="left-menu-wrapper" class="col-md-3"><nav id=
 "nav-main"><ul><li class="level-1"><a class="expandible" href="/"><span>Apache 
PredictionIO® Documentation</span></a><ul><li class="level-2"><a class="final" 
href="/"><span>Welcome to Apache PredictionIO®</span></a></li></ul></li><li 
class="level-1"><a class="expandible" href="#"><span>Getting 
Started</span></a><ul><li class="level-2"><a class="final" 
href="/start/"><span>A Quick Intro</span></a></li><li class="level-2"><a 
class="final" href="/install/"><span>Installing Apache 
PredictionIO</span></a></li><li class="level-2"><a class="final" 
href="/start/download/"><span>Downloading an Engine Template</span></a></li><li 
class="level-2"><a class="final" href="/start/deploy/"><span>Deploying Your 
First Engine</span></a></li><li class="level-2"><a class="final" 
href="/start/customize/"><span>Customizing the 
Engine</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>Integrating with Your App</span></a><ul><li class="level-2"><a 
class="final" href="/appinte
 gration/"><span>App Integration Overview</span></a></li><li class="level-2"><a 
class="expandible" href="/sdk/"><span>List of SDKs</span></a><ul><li 
class="level-3"><a class="final" href="/sdk/java/"><span>Java & Android 
SDK</span></a></li><li class="level-3"><a class="final" 
href="/sdk/php/"><span>PHP SDK</span></a></li><li class="level-3"><a 
class="final" href="/sdk/python/"><span>Python SDK</span></a></li><li 
class="level-3"><a class="final" href="/sdk/ruby/"><span>Ruby 
SDK</span></a></li><li class="level-3"><a class="final" 
href="/sdk/community/"><span>Community Powered 
SDKs</span></a></li></ul></li></ul></li><li class="level-1"><a 
class="expandible" href="#"><span>Deploying an Engine</span></a><ul><li 
class="level-2"><a class="final" href="/deploy/"><span>Deploying as a Web 
Service</span></a></li><li class="level-2"><a class="final" 
href="/batchpredict/"><span>Batch Predictions</span></a></li><li 
class="level-2"><a class="final" href="/deploy/monitoring/"><span>Monitoring 
Engine
 </span></a></li><li class="level-2"><a class="final" 
href="/deploy/engineparams/"><span>Setting Engine Parameters</span></a></li><li 
class="level-2"><a class="final" href="/deploy/enginevariants/"><span>Deploying 
Multiple Engine 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" 
href="/customize/"><span>Learning DASE</span></a></li><li class="level-2"><a 
class="final" href="/customize/dase/"><span>Implement DASE</span></a></li><li 
class="level-2"><a class="final" 
href="/customize/troubleshooting/"><span>Troubleshooting Engine 
Development</span></a></li><li class="level-2"><a class="final" 
href="/api/current/#package"><span>Engine Scala 
APIs</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>Collecting and Analyzing Data</span></a><ul><li cla
 ss="level-2"><a class="final" href="/datacollection/"><span>Event Server 
Overview</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/eventapi/"><span>Collecting Data with 
REST/SDKs</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/eventmodel/"><span>Events Modeling</span></a></li><li 
class="level-2"><a class="final" 
href="/datacollection/webhooks/"><span>Unifying Multichannel Data with 
Webhooks</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/channel/"><span>Channel</span></a></li><li 
class="level-2"><a class="final" 
href="/datacollection/batchimport/"><span>Importing Data in 
Batch</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/analytics/"><span>Using Analytics 
Tools</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/plugin/"><span>Event Server 
Plugin</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>Choosing an Algorithm(s)</span>
 </a><ul><li class="level-2"><a class="final" href="/algorithm/"><span>Built-in 
Algorithm Libraries</span></a></li><li class="level-2"><a class="final" 
href="/algorithm/switch/"><span>Switching to Another 
Algorithm</span></a></li><li class="level-2"><a class="final" 
href="/algorithm/multiple/"><span>Combining Multiple 
Algorithms</span></a></li><li class="level-2"><a class="final" 
href="/algorithm/custom/"><span>Adding Your Own 
Algorithms</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>ML Tuning and Evaluation</span></a><ul><li class="level-2"><a 
class="final" href="/evaluation/"><span>Overview</span></a></li><li 
class="level-2"><a class="final" 
href="/evaluation/paramtuning/"><span>Hyperparameter Tuning</span></a></li><li 
class="level-2"><a class="final" 
href="/evaluation/evaluationdashboard/"><span>Evaluation 
Dashboard</span></a></li><li class="level-2"><a class="final" 
href="/evaluation/metricchoose/"><span>Choosing Evaluation Metrics</span></a></l
 i><li class="level-2"><a class="final" 
href="/evaluation/metricbuild/"><span>Building Evaluation 
Metrics</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>System Architecture</span></a><ul><li class="level-2"><a 
class="final" href="/system/"><span>Architecture Overview</span></a></li><li 
class="level-2"><a class="final" href="/system/anotherdatastore/"><span>Using 
Another Data Store</span></a></li></ul></li><li class="level-1"><a 
class="expandible" href="#"><span>PredictionIO® Official 
Templates</span></a><ul><li class="level-2"><a class="final" 
href="/templates/"><span>Intro</span></a></li><li class="level-2"><a 
class="expandible" href="#"><span>Recommendation</span></a><ul><li 
class="level-3"><a class="final" 
href="/templates/recommendation/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" href="/templates/recommend
 ation/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 
class="level-3"><a class="final" 
href="/templates/recommendation/reading-custom-events/"><span>Read Custom 
Events</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/customize-data-prep/"><span>Customize Data 
Preparator</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/customize-serving/"><span>Customize 
Serving</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/training-with-implicit-preference/"><span>Train 
with Implicit Preference</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/blacklist-items/"><span>Filter Recommended 
Items by Blacklist in Query</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/batch-evaluator/"><span>Batch Persistable 
Evaluato
 r</span></a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>E-Commerce Recommendation</span></a><ul><li class="level-3"><a 
class="final" href="/templates/ecommercerecommendation/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/how-to/"><span>How-To</span></a></li><li
 class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/train-with-rate-event/"><span>Train 
with Rate Event</span></a></li><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/adjust-score/"><span>Adjust 
Score</span></a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>Similar Product</span></a><ul><li class="level-3"><a 
class="final" href="/templates/similarproduct/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" hr
 ef="/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 
Event</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/rid-user-set-event/"><span>Get Rid of Events 
for Users</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/recommended-user/"><span>Recommend 
Users</span></a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>Classification</span></a><ul><li class="level-3"><a class="final"
  href="/templates/classification/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/classification/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/classification/how-to/"><span>How-To</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/classification/add-algorithm/"><span>Use Alternative 
Algorithm</span></a></li><li class="level-3"><a class="final" 
href="/templates/classification/reading-custom-properties/"><span>Read Custom 
Properties</span></a></li></ul></li></ul></li><li class="level-1"><a 
class="expandible" href="#"><span>Engine Template Gallery</span></a><ul><li 
class="level-2"><a class="final" 
href="/gallery/template-gallery/"><span>Browse</span></a></li><li 
class="level-2"><a class="final" 
href="/community/submit-template/"><span>Submit your Engine as a 
Template</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>Demo Tutorials</span></a><ul><
 li class="level-2"><a class="final" href="/demo/tapster/"><span>Comics 
Recommendation Demo</span></a></li><li class="level-2"><a class="final" 
href="/demo/community/"><span>Community Contributed Demo</span></a></li><li 
class="level-2"><a class="final" href="/demo/textclassification/"><span>Text 
Classification Engine Tutorial</span></a></li></ul></li><li class="level-1"><a 
class="expandible" href="/community/"><span>Getting Involved</span></a><ul><li 
class="level-2"><a class="final" 
href="/community/contribute-code/"><span>Contribute Code</span></a></li><li 
class="level-2"><a class="final" 
href="/community/contribute-documentation/"><span>Contribute 
Documentation</span></a></li><li class="level-2"><a class="final" 
href="/community/contribute-sdk/"><span>Contribute a SDK</span></a></li><li 
class="level-2"><a class="final" 
href="/community/contribute-webhook/"><span>Contribute a 
Webhook</span></a></li><li class="level-2"><a class="final" 
href="/community/projects/"><span>Community Proj
 ects</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>Getting Help</span></a><ul><li class="level-2"><a class="final" 
href="/resources/faq/"><span>FAQs</span></a></li><li class="level-2"><a 
class="final" href="/support/"><span>Support</span></a></li></ul></li><li 
class="level-1"><a class="expandible" 
href="#"><span>Resources</span></a><ul><li class="level-2"><a class="final" 
href="/cli/"><span>Command-line Interface</span></a></li><li class="level-2"><a 
class="final" href="/resources/release/"><span>Release 
Cadence</span></a></li><li class="level-2"><a class="final" 
href="/resources/intellij/"><span>Developing Engines with IntelliJ 
IDEA</span></a></li><li class="level-2"><a class="final" 
href="/resources/upgrade/"><span>Upgrade Instructions</span></a></li><li 
class="level-2"><a class="final" 
href="/resources/glossary/"><span>Glossary</span></a></li></ul></li><li 
class="level-1"><a class="expandible" href="#"><span>Apache Software 
Foundation</span></a
 ><ul><li class="level-2"><a class="final" 
 >href="https://www.apache.org/";><span>Apache Homepage</span></a></li><li 
 >class="level-2"><a class="final" 
 >href="https://www.apache.org/licenses/";><span>License</span></a></li><li 
 >class="level-2"><a class="final" 
 >href="https://www.apache.org/foundation/sponsorship.html";><span>Sponsorship</span></a></li><li
 > class="level-2"><a class="final" 
 >href="https://www.apache.org/foundation/thanks.html";><span>Thanks</span></a></li><li
 > class="level-2"><a class="final" 
 >href="https://www.apache.org/security/";><span>Security</span></a></li></ul></li></ul></nav></div><div
 > class="col-md-9 col-sm-12"><div class="content-header hidden-md 
 >hidden-lg"><div id="page-title"><h1>Sample Style Page</h1></div></div><div 
 >id="table-of-content-wrapper"><h5>On this page</h5><aside 
 >id="table-of-contents"><ul> <li> <a href="#alerts">Alerts</a> </li> <li> <a 
 >href="#text">Text</a> </li> <li> <a href="#lists">Lists</a> </li> <li> <a 
 >href="#code">Code</a> </li> <li> <a href="#image"
 >Image</a> </li> <li> <a href="#quotes">Quotes</a> </li> <li> <a 
 >href="#tables">Tables</a> </li> <li> <a href="#other">Other</a> </li> </ul> 
 ></li> <li> <a href="#heading-1">Heading 1</a> <ul> <li> <a 
 >href="#heading-2">Heading 2</a> </li> </ul> </aside><hr/><a 
 >id="edit-page-link" 
 >href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/samples/index.html.md";><img
 > src="/images/icons/edit-pencil-d6c1bb3d.png"/>Edit this page</a></div><div 
 >class="content-header hidden-sm hidden-xs"><div id="page-title"><h1>Sample 
 >Style Page</h1></div></div><div class="content"> <h2 id='alerts' 
 >class='header-anchors'>Alerts</h2><h3 id='info' 
 >class='header-anchors'>Info</h3><p>Markdown: <code>INFO: This is a info 
 >message!</code> will display this:</p><div class="alert-message info"><p>This 
 >is a info message!</p></div><h3 id='success' 
 >class='header-anchors'>Success</h3><p>Markdown: <code>SUCCESS: This is a 
 >success message!</code> will display this:</p><div class="alert-message
  success"><p>This is a success message!</p></div><h3 id='warning' 
class='header-anchors'>Warning</h3><p>Markdown: <code>WARNING: This is a 
warning message!</code> will display this:</p><div class="alert-message 
warning"><p>This is a warning message!</p></div><h3 id='danger' 
class='header-anchors'>Danger</h3><p>Markdown: <code>DANGER: This is a danger 
message!</code> will display this:</p><div class="alert-message danger"><p>This 
is a danger message!</p></div><h3 id='note' 
class='header-anchors'>Note</h3><p>Markdown: <code>NOTE: This is a note 
message!</code> will display this:</p><div class="alert-message note"><p>This 
is a note message!</p></div><h3 id='todo' 
class='header-anchors'>TODO</h3><p>Markdown: <code>TODO: This is a TODO 
message!</code> will display this:</p><div class="alert-message todo"><p>This 
is a TODO message! This message is longer to demonstrate what a multi line 
message would look like. This message is longer to demonstrate what a multi 
line message would look lik
 e. This message is longer to demonstrate what a multi line message would look 
like. Yes <strong>bold</strong> and other styling still work inside 
alerts!</p></div><h2 id='text' class='header-anchors'>Text</h2><p>This is the 
normal paragraph font. This is a <a href="/samples/tabs">internal link</a>. 
This is an <a href="http://google.com/";>external link</a> This is a <a 
href="https://google.com/";>secure external link</a> This is 
<strong>bold</strong>. This is <em>italic</em>. This is <u>underlined</u>. This 
is <mark>highlighted</mark>. This is <del>strikethough</del>. This is 
<sup>superscript</sup>.</p><p>This is another paragraph.</p><p>View <a 
href="/samples/sizing">additional sizing</a> samples.</p><h2 id='lists' 
class='header-anchors'>Lists</h2> <ul> <li>Bullet 1</li> <li>Bullet 2 <ul> 
<li>Bullet 2.1</li> <li>Bullet 2.2</li> </ul></li> <li>Bullet 3</li> </ul> <ol> 
<li>First item</li> <li>Second item</li> <li>Third item</li> </ol> <h2 
id='code' class='header-anchors'>Code</h2><h3 i
 d='block' class='header-anchors'>Block</h3><p>This is a Scala code 
block:</p><div class="highlight scala"><table style="border-spacing: 
0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre 
class="lineno">1
+<!DOCTYPE html><html><head><title>Sample Style Page</title><meta 
charset="utf-8"/><meta content="IE=edge,chrome=1" 
http-equiv="X-UA-Compatible"/><meta name="viewport" 
content="width=device-width, initial-scale=1.0"/><meta class="swiftype" 
name="title" data-type="string" content="Sample Style Page"/><link 
rel="canonical" href="https://predictionio.apache.org/samples/"/><link 
href="/images/favicon/normal-b330020a.png" rel="shortcut icon"/><link 
href="/images/favicon/apple-c0febcf2.png" rel="apple-touch-icon"/><link 
href="//fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800"
 rel="stylesheet"/><link 
href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" 
rel="stylesheet"/><link href="/stylesheets/application-eccfc6cb.css" 
rel="stylesheet" type="text/css"/><script 
src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.2/html5shiv.min.js"></script><script
 src="//cdn.mathjax.org/mathjax/latest/MathJax.js?config=
 TeX-AMS-MML_HTMLorMML"></script><script 
src="//use.typekit.net/pqo0itb.js"></script><script>try{Typekit.load({ async: 
true });}catch(e){}</script></head><body><div id="global"><header><div 
class="container" id="header-wrapper"><div class="row"><div 
class="col-sm-12"><div id="logo-wrapper"><span id="drawer-toggle"></span><a 
href="#"></a><a href="http://predictionio.apache.org/";><img alt="Apache 
PredictionIO" id="logo" 
src="/images/logos/logo-ee2b9bb3.png"/></a><span>®</span></div><div 
id="menu-wrapper"><div id="pill-wrapper"><a class="pill left" 
href="/gallery/template-gallery">TEMPLATES</a> <a class="pill right" 
href="//github.com/apache/predictionio/">OPEN SOURCE</a></div></div><img 
class="mobile-search-bar-toggler hidden-md hidden-lg" 
src="/images/icons/search-glass-704bd4ff.png"/></div></div></div></header><div 
id="search-bar-row-wrapper"><div class="container-fluid" 
id="search-bar-row"><div class="row"><div class="col-md-9 col-sm-11 
col-xs-11"><div class="hidden-md hidden-lg" i
 d="mobile-page-heading-wrapper"><p>PredictionIO Docs</p><h4>Sample Style 
Page</h4></div><h4 class="hidden-sm hidden-xs">PredictionIO Docs</h4></div><div 
class="col-md-3 col-sm-1 col-xs-1 hidden-md hidden-lg"><img 
id="left-menu-indicator" 
src="/images/icons/down-arrow-dfe9f7fe.png"/></div><div class="col-md-3 
col-sm-12 col-xs-12 swiftype-wrapper"><div class="swiftype"><form 
class="search-form"><img class="search-box-toggler hidden-xs hidden-sm" 
src="/images/icons/search-glass-704bd4ff.png"/><div class="search-box"><img 
src="/images/icons/search-glass-704bd4ff.png"/><input type="text" 
id="st-search-input" class="st-search-input" placeholder="Search 
Doc..."/></div><img class="swiftype-row-hider hidden-md hidden-lg" 
src="/images/icons/drawer-toggle-active-fcbef12a.png"/></form></div></div><div 
class="mobile-left-menu-toggler hidden-md 
hidden-lg"></div></div></div></div><div id="page" class="container-fluid"><div 
class="row"><div id="left-menu-wrapper" class="col-md-3"><nav id="nav-main"
 ><ul><li class="level-1"><a class="expandible" href="/"><span>Apache 
 >PredictionIO® Documentation</span></a><ul><li class="level-2"><a 
 >class="final" href="/"><span>Welcome to Apache 
 >PredictionIO®</span></a></li></ul></li><li class="level-1"><a 
 >class="expandible" href="#"><span>Getting Started</span></a><ul><li 
 >class="level-2"><a class="final" href="/start/"><span>A Quick 
 >Intro</span></a></li><li class="level-2"><a class="final" 
 >href="/install/"><span>Installing Apache PredictionIO</span></a></li><li 
 >class="level-2"><a class="final" href="/start/download/"><span>Downloading an 
 >Engine Template</span></a></li><li class="level-2"><a class="final" 
 >href="/start/deploy/"><span>Deploying Your First Engine</span></a></li><li 
 >class="level-2"><a class="final" href="/start/customize/"><span>Customizing 
 >the Engine</span></a></li></ul></li><li class="level-1"><a class="expandible" 
 >href="#"><span>Integrating with Your App</span></a><ul><li class="level-2"><a 
 >class="final" href="/appintegration/">
 <span>App Integration Overview</span></a></li><li class="level-2"><a 
class="expandible" href="/sdk/"><span>List of SDKs</span></a><ul><li 
class="level-3"><a class="final" href="/sdk/java/"><span>Java & Android 
SDK</span></a></li><li class="level-3"><a class="final" 
href="/sdk/php/"><span>PHP SDK</span></a></li><li class="level-3"><a 
class="final" href="/sdk/python/"><span>Python SDK</span></a></li><li 
class="level-3"><a class="final" href="/sdk/ruby/"><span>Ruby 
SDK</span></a></li><li class="level-3"><a class="final" 
href="/sdk/community/"><span>Community Powered 
SDKs</span></a></li></ul></li></ul></li><li class="level-1"><a 
class="expandible" href="#"><span>Deploying an Engine</span></a><ul><li 
class="level-2"><a class="final" href="/deploy/"><span>Deploying as a Web 
Service</span></a></li><li class="level-2"><a class="final" 
href="/batchpredict/"><span>Batch Predictions</span></a></li><li 
class="level-2"><a class="final" href="/deploy/monitoring/"><span>Monitoring 
Engine</span></a
 ></li><li class="level-2"><a class="final" 
 >href="/deploy/engineparams/"><span>Setting Engine 
 >Parameters</span></a></li><li class="level-2"><a class="final" 
 >href="/deploy/enginevariants/"><span>Deploying Multiple Engine 
 >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" href="/customize/"><span>Learning DASE</span></a></li><li 
 >class="level-2"><a class="final" href="/customize/dase/"><span>Implement 
 >DASE</span></a></li><li class="level-2"><a class="final" 
 >href="/customize/troubleshooting/"><span>Troubleshooting Engine 
 >Development</span></a></li><li class="level-2"><a class="final" 
 >href="/api/current/#package"><span>Engine Scala 
 >APIs</span></a></li></ul></li><li class="level-1"><a class="expandible" 
 >href="#"><span>Collecting and Analyzing Data</span></a><ul><li class="level-
 2"><a class="final" href="/datacollection/"><span>Event Server 
Overview</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/eventapi/"><span>Collecting Data with 
REST/SDKs</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/eventmodel/"><span>Events Modeling</span></a></li><li 
class="level-2"><a class="final" 
href="/datacollection/webhooks/"><span>Unifying Multichannel Data with 
Webhooks</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/channel/"><span>Channel</span></a></li><li 
class="level-2"><a class="final" 
href="/datacollection/batchimport/"><span>Importing Data in 
Batch</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/analytics/"><span>Using Analytics 
Tools</span></a></li><li class="level-2"><a class="final" 
href="/datacollection/plugin/"><span>Event Server 
Plugin</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>Choosing an Algorithm(s)</span></a><ul><l
 i class="level-2"><a class="final" href="/algorithm/"><span>Built-in Algorithm 
Libraries</span></a></li><li class="level-2"><a class="final" 
href="/algorithm/switch/"><span>Switching to Another 
Algorithm</span></a></li><li class="level-2"><a class="final" 
href="/algorithm/multiple/"><span>Combining Multiple 
Algorithms</span></a></li><li class="level-2"><a class="final" 
href="/algorithm/custom/"><span>Adding Your Own 
Algorithms</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>ML Tuning and Evaluation</span></a><ul><li class="level-2"><a 
class="final" href="/evaluation/"><span>Overview</span></a></li><li 
class="level-2"><a class="final" 
href="/evaluation/paramtuning/"><span>Hyperparameter Tuning</span></a></li><li 
class="level-2"><a class="final" 
href="/evaluation/evaluationdashboard/"><span>Evaluation 
Dashboard</span></a></li><li class="level-2"><a class="final" 
href="/evaluation/metricchoose/"><span>Choosing Evaluation 
Metrics</span></a></li><li clas
 s="level-2"><a class="final" href="/evaluation/metricbuild/"><span>Building 
Evaluation Metrics</span></a></li></ul></li><li class="level-1"><a 
class="expandible" href="#"><span>System Architecture</span></a><ul><li 
class="level-2"><a class="final" href="/system/"><span>Architecture 
Overview</span></a></li><li class="level-2"><a class="final" 
href="/system/anotherdatastore/"><span>Using Another Data 
Store</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>PredictionIO® Official Templates</span></a><ul><li 
class="level-2"><a class="final" 
href="/templates/"><span>Intro</span></a></li><li class="level-2"><a 
class="expandible" href="#"><span>Recommendation</span></a><ul><li 
class="level-3"><a class="final" 
href="/templates/recommendation/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" href="/templates/recommendation/eval
 uation/"><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 
class="level-3"><a class="final" 
href="/templates/recommendation/reading-custom-events/"><span>Read Custom 
Events</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/customize-data-prep/"><span>Customize Data 
Preparator</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/customize-serving/"><span>Customize 
Serving</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/training-with-implicit-preference/"><span>Train 
with Implicit Preference</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/blacklist-items/"><span>Filter Recommended 
Items by Blacklist in Query</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/batch-evaluator/"><span>Batch Persistable 
Evaluator</span></
 a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>E-Commerce Recommendation</span></a><ul><li class="level-3"><a 
class="final" href="/templates/ecommercerecommendation/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/how-to/"><span>How-To</span></a></li><li
 class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/train-with-rate-event/"><span>Train 
with Rate Event</span></a></li><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/adjust-score/"><span>Adjust 
Score</span></a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>Similar Product</span></a><ul><li class="level-3"><a 
class="final" href="/templates/similarproduct/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" href="/templ
 ates/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 
Event</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/rid-user-set-event/"><span>Get Rid of Events 
for Users</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/recommended-user/"><span>Recommend 
Users</span></a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>Classification</span></a><ul><li class="level-3"><a 
class="final" href="/te
 mplates/classification/quickstart/"><span>Quick Start</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/classification/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/classification/how-to/"><span>How-To</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/classification/add-algorithm/"><span>Use Alternative 
Algorithm</span></a></li><li class="level-3"><a class="final" 
href="/templates/classification/reading-custom-properties/"><span>Read Custom 
Properties</span></a></li></ul></li></ul></li><li class="level-1"><a 
class="expandible" href="#"><span>Engine Template Gallery</span></a><ul><li 
class="level-2"><a class="final" 
href="/gallery/template-gallery/"><span>Browse</span></a></li><li 
class="level-2"><a class="final" 
href="/community/submit-template/"><span>Submit your Engine as a 
Template</span></a></li></ul></li><li class="level-1"><a class="expandible" 
href="#"><span>Demo Tutorials</span></a><ul><li class="
 level-2"><a class="final" href="/demo/tapster/"><span>Comics Recommendation 
Demo</span></a></li><li class="level-2"><a class="final" 
href="/demo/community/"><span>Community Contributed Demo</span></a></li><li 
class="level-2"><a class="final" href="/demo/textclassification/"><span>Text 
Classification Engine Tutorial</span></a></li></ul></li><li class="level-1"><a 
class="expandible" href="/community/"><span>Getting Involved</span></a><ul><li 
class="level-2"><a class="final" 
href="/community/contribute-code/"><span>Contribute Code</span></a></li><li 
class="level-2"><a class="final" 
href="/community/contribute-documentation/"><span>Contribute 
Documentation</span></a></li><li class="level-2"><a class="final" 
href="/community/contribute-sdk/"><span>Contribute a SDK</span></a></li><li 
class="level-2"><a class="final" 
href="/community/contribute-webhook/"><span>Contribute a 
Webhook</span></a></li><li class="level-2"><a class="final" 
href="/community/projects/"><span>Community Projects</span
 ></a></li></ul></li><li class="level-1"><a class="expandible" 
 >href="#"><span>Getting Help</span></a><ul><li class="level-2"><a 
 >class="final" href="/resources/faq/"><span>FAQs</span></a></li><li 
 >class="level-2"><a class="final" 
 >href="/support/"><span>Support</span></a></li></ul></li><li 
 >class="level-1"><a class="expandible" 
 >href="#"><span>Resources</span></a><ul><li class="level-2"><a class="final" 
 >href="/cli/"><span>Command-line Interface</span></a></li><li 
 >class="level-2"><a class="final" href="/resources/release/"><span>Release 
 >Cadence</span></a></li><li class="level-2"><a class="final" 
 >href="/resources/intellij/"><span>Developing Engines with IntelliJ 
 >IDEA</span></a></li><li class="level-2"><a class="final" 
 >href="/resources/upgrade/"><span>Upgrade Instructions</span></a></li><li 
 >class="level-2"><a class="final" 
 >href="/resources/glossary/"><span>Glossary</span></a></li></ul></li><li 
 >class="level-1"><a class="expandible" href="#"><span>Apache Software 
 >Foundation</span></a><ul><li c
 lass="level-2"><a class="final" href="https://www.apache.org/";><span>Apache 
Homepage</span></a></li><li class="level-2"><a class="final" 
href="https://www.apache.org/licenses/";><span>License</span></a></li><li 
class="level-2"><a class="final" 
href="https://www.apache.org/foundation/sponsorship.html";><span>Sponsorship</span></a></li><li
 class="level-2"><a class="final" 
href="https://www.apache.org/foundation/thanks.html";><span>Thanks</span></a></li><li
 class="level-2"><a class="final" 
href="https://www.apache.org/security/";><span>Security</span></a></li></ul></li></ul></nav></div><div
 class="col-md-9 col-sm-12"><div class="content-header hidden-md 
hidden-lg"><div id="page-title"><h1>Sample Style Page</h1></div></div><div 
id="table-of-content-wrapper"><h5>On this page</h5><aside 
id="table-of-contents"><ul> <li> <a href="#alerts">Alerts</a> </li> <li> <a 
href="#text">Text</a> </li> <li> <a href="#lists">Lists</a> </li> <li> <a 
href="#code">Code</a> </li> <li> <a href="#image">Image</a>
  </li> <li> <a href="#quotes">Quotes</a> </li> <li> <a 
href="#tables">Tables</a> </li> <li> <a href="#other">Other</a> </li> </ul> 
</li> <li> <a href="#heading-1">Heading 1</a> <ul> <li> <a 
href="#heading-2">Heading 2</a> </li> </ul> </aside><hr/><a id="edit-page-link" 
href="https://github.com/apache/predictionio/tree/livedoc/docs/manual/source/samples/index.html.md";><img
 src="/images/icons/edit-pencil-d6c1bb3d.png"/>Edit this page</a></div><div 
class="content-header hidden-sm hidden-xs"><div id="page-title"><h1>Sample 
Style Page</h1></div></div><div class="content"> <h2 id='alerts' 
class='header-anchors'>Alerts</h2><h3 id='info' 
class='header-anchors'>Info</h3><p>Markdown: <code>INFO: This is a info 
message!</code> will display this:</p><div class="alert-message info"><p>This 
is a info message!</p></div><h3 id='success' 
class='header-anchors'>Success</h3><p>Markdown: <code>SUCCESS: This is a 
success message!</code> will display this:</p><div class="alert-message 
success"><p>This is
  a success message!</p></div><h3 id='warning' 
class='header-anchors'>Warning</h3><p>Markdown: <code>WARNING: This is a 
warning message!</code> will display this:</p><div class="alert-message 
warning"><p>This is a warning message!</p></div><h3 id='danger' 
class='header-anchors'>Danger</h3><p>Markdown: <code>DANGER: This is a danger 
message!</code> will display this:</p><div class="alert-message danger"><p>This 
is a danger message!</p></div><h3 id='note' 
class='header-anchors'>Note</h3><p>Markdown: <code>NOTE: This is a note 
message!</code> will display this:</p><div class="alert-message note"><p>This 
is a note message!</p></div><h3 id='todo' 
class='header-anchors'>TODO</h3><p>Markdown: <code>TODO: This is a TODO 
message!</code> will display this:</p><div class="alert-message todo"><p>This 
is a TODO message! This message is longer to demonstrate what a multi line 
message would look like. This message is longer to demonstrate what a multi 
line message would look like. This message is l
 onger to demonstrate what a multi line message would look like. Yes 
<strong>bold</strong> and other styling still work inside alerts!</p></div><h2 
id='text' class='header-anchors'>Text</h2><p>This is the normal paragraph font. 
This is a <a href="/samples/tabs">internal link</a>. This is an <a 
href="http://google.com/";>external link</a> This is a <a 
href="https://google.com/";>secure external link</a> This is 
<strong>bold</strong>. This is <em>italic</em>. This is <u>underlined</u>. This 
is <mark>highlighted</mark>. This is <del>strikethough</del>. This is 
<sup>superscript</sup>.</p><p>This is another paragraph.</p><p>View <a 
href="/samples/sizing">additional sizing</a> samples.</p><h2 id='lists' 
class='header-anchors'>Lists</h2> <ul> <li>Bullet 1</li> <li>Bullet 2 <ul> 
<li>Bullet 2.1</li> <li>Bullet 2.2</li> </ul></li> <li>Bullet 3</li> </ul> <ol> 
<li>First item</li> <li>Second item</li> <li>Third item</li> </ol> <h2 
id='code' class='header-anchors'>Code</h2><h3 id='block' class='hea
 der-anchors'>Block</h3><p>This is a Scala code block:</p><div class="highlight 
scala"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" 
style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -7,7 +7,7 @@
   <span class="n">num</span><span class="k">:</span> <span 
class="kt">Int</span>
 <span class="o">)</span> <span class="k">extends</span> <span 
class="nc">Serializable</span>
 
-</pre></td></tr></tbody></table> </div> <p>See a full list of <a 
href="/samples/languages">supported languages</a>.</p><h3 id='inline' 
class='header-anchors'>Inline</h3><p>This <code>code is inline</code>.</p><h2 
id='image' class='header-anchors'>Image</h2><p><img alt="Sample Image" 
src="/images/tutorials/rails/localhost-8000-e55d5dd2.png"/></p><h2 id='quotes' 
class='header-anchors'>Quotes</h2> <blockquote> <p>This is a blockquote. 
Don&#39;t use these for anything other actual quotes! Use <a 
href="#alerts">alerts</a> instead.</p></blockquote> <h2 id='tables' 
class='header-anchors'>Tables</h2> <table><thead> <tr> <th>First Header</th> 
<th>Second Header</th> </tr> </thead><tbody> <tr> <td>Content Cell</td> 
<td>Content Cell</td> </tr> <tr> <td>Content Cell</td> <td>Content Cell</td> 
</tr> </tbody></table> <h2 id='other' class='header-anchors'>Other</h2><p>This 
is a horizontal rule:</p> <hr> <p>This is a en dash &ndash; and an em dash 
&mdash; using HTML entities.</p><div>This is inside 
 a div tag.</div> <h1 id='heading-1' class='header-anchors'>Heading 
1</h1><p>This is the normal paragraph font.</p><h2 id='heading-2' 
class='header-anchors'>Heading 2</h2><p>This is the normal paragraph 
font.</p><h3 id='heading-3' class='header-anchors'>Heading 3</h3><p>This is the 
normal paragraph font.</p><h4 id='heading-4' class='header-anchors'>Heading 
4</h4><p>This is the normal paragraph font.</p><h5 id='heading-5' 
class='header-anchors'>Heading 5</h5><p>This is the normal paragraph 
font.</p><h6 id='heading-6' class='header-anchors'>Heading 6</h6><p>This is the 
normal paragraph font.</p></div></div></div></div><footer><div 
class="container"><div class="seperator"></div><div class="row"><div 
class="col-md-6 footer-link-column"><div 
class="footer-link-column-row"><h4>Community</h4><ul><li><a 
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Apache, the Apache feather logo, and the Apache PredictionIO project logo are 
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+</pre></td></tr></tbody></table> </div> <p>See a full list of <a 
href="/samples/languages">supported languages</a>.</p><h3 id='inline' 
class='header-anchors'>Inline</h3><p>This <code>code is inline</code>.</p><h2 
id='image' class='header-anchors'>Image</h2><p><img alt="Sample Image" 
src="/images/tutorials/rails/localhost-8000-e55d5dd2.png"/></p><h2 id='quotes' 
class='header-anchors'>Quotes</h2> <blockquote> <p>This is a blockquote. 
Don&#39;t use these for anything other actual quotes! Use <a 
href="#alerts">alerts</a> instead.</p></blockquote> <h2 id='tables' 
class='header-anchors'>Tables</h2> <table><thead> <tr> <th>First Header</th> 
<th>Second Header</th> </tr> </thead><tbody> <tr> <td>Content Cell</td> 
<td>Content Cell</td> </tr> <tr> <td>Content Cell</td> <td>Content Cell</td> 
</tr> </tbody></table> <h2 id='other' class='header-anchors'>Other</h2><p>This 
is a horizontal rule:</p> <hr> <p>This is a en dash &ndash; and an em dash 
&mdash; using HTML entities.</p><div>This is inside 
 a div tag.</div> <h1 id='heading-1' class='header-anchors'>Heading 
1</h1><p>This is the normal paragraph font.</p><h2 id='heading-2' 
class='header-anchors'>Heading 2</h2><p>This is the normal paragraph 
font.</p><h3 id='heading-3' class='header-anchors'>Heading 3</h3><p>This is the 
normal paragraph font.</p><h4 id='heading-4' class='header-anchors'>Heading 
4</h4><p>This is the normal paragraph font.</p><h5 id='heading-5' 
class='header-anchors'>Heading 5</h5><p>This is the normal paragraph 
font.</p><h6 id='heading-6' class='header-anchors'>Heading 6</h6><p>This is the 
normal paragraph font.</p></div></div></div></div><footer><div 
class="container"><div class="seperator"></div><div class="row"><div 
class="col-md-6 footer-link-column"><div 
class="footer-link-column-row"><h4>Community</h4><ul><li><a 
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http://git-wip-us.apache.org/repos/asf/predictionio-site/blob/9d2bd407/samples/languages/index.html
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hidden-lg"><div id="page-title"><h1>Language Samples</h1></div></div><div 
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<li> <a href="#scala">Scala</a> </li> <li> <a href="#ruby">Ruby</a> </li> <li> 
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</aside><hr/><a id="edit-page-link" 
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class="content-header hidden-sm hidden-xs"><div id="page-title"><h1>Language 
Samples</h1></div></div><div class="content"> <h2 id='plain-text' 
class='header-anchors'>Plain Text</h2><p>This is a sample code block with no 
language.</p><div class="highlight shell"><table style="border-spacing: 
0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre 
class="lineno">1
+<!DOCTYPE html><html><head><title>Language Samples</title><meta 
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http-equiv="X-UA-Compatible"/><meta name="viewport" 
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 2
 3
 4</pre></td><td class="code"><pre><span class="gp">$ </span><span 
class="nv">$PIO_HOME</span>/bin/pio eventserver
@@ -142,7 +142,7 @@
     <span class="n">properties</span><span class="o">=</span><span 
class="n">first_event_properties</span><span class="p">,</span>
     <span class="n">event_time</span><span class="o">=</span><span 
class="n">first_event_time</span><span class="p">,</span>
 <span class="p">)</span>
-</pre></td></tr></tbody></table> </div> </div></div></div></div><footer><div 
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