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 class="col-md-9 col-sm-12"><div class="content-header hidden-md 
hidden-lg"><div id="breadcrumbs" class="hidden-sm hidden xs"><ul><li><a 
href="#">Collecting and Analyzing Data</a><span 
class="spacer">&gt;</span></li><li><span class="last">Events 
Modeling</span></li></ul></div><div id="page-title"><h1>Events 
Modeling</h1></div></div><div id="table-of-content-wrapper"><h5>On t
 his page</h5><aside id="table-of-contents"><ul> <li> <a 
href="#1-generic-events-performed-by-an-entity">1. Generic events performed by 
an entity</a> </li> <li> <a 
href="#2-special-events-for-recording-changes-of-an-entity-s-properties">2. 
Special events for recording changes of an entity's properties</a> </li> <li> 
<a href="#3-batch-events-to-the-eventserver">3. Batch Events to the 
EventServer</a> </li> </ul> </aside><hr/><a id="edit-page-link" 
href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/datacollection/eventmodel.html.md.erb";><img
 src="/images/icons/edit-pencil-d6c1bb3d.png"/>Edit this page</a></div><div 
class="content-header hidden-sm hidden-xs"><div id="breadcrumbs" 
class="hidden-sm hidden xs"><ul><li><a href="#">Collecting and Analyzing 
Data</a><span class="spacer">&gt;</span></li><li><span class="last">Events 
Modeling</span></li></ul></div><div id="page-title"><h1>Events 
Modeling</h1></div></div><div class="content"> <p>This section exp
 lains how to model your application data as 
events.</p><p><strong>Entity</strong>: it&#39;s the real world object involved 
in the events. The entity may perform the events, or interact with other entity 
(which became <code>targetEntity</code> in an event).</p><p>For example, your 
application may have users and some items which the user can interact with. 
Then you can model them as two entity types: <strong>user</strong> and 
<strong>item</strong> and the entityId can uniquely identify the entity within 
each entityType (e.g. user with ID 1, item with ID 1).</p><p>An entity may 
peform some events (e.g user 1 does something), and entity may have properties 
associated with it (e.g. user may have gender, age, email etc). Hence, 
<strong>events</strong> involve <strong>entities</strong> and there are three 
types of events, respectively:</p> <ol> <li>Generic events performed by an 
entity.</li> <li>Special events for recording changes of an entity&#39;s 
properties</li> <li>Batch events</li> <
 /ol> <p>They are explained in details below.</p><h2 
id='1.-generic-events-performed-by-an-entity' class='header-anchors'>1. Generic 
events performed by an entity</h2><p>Whenever the entity performs an action, 
you can describe such event as <code>entity &quot;verb&quot; targetEntity with 
&quot;some extra information&quot;</code>. The 
<em>&quot;targetEntity&quot;</em> and <em>&quot;some extra 
information&quot;</em> can be optional. The <em>&quot;verb&quot;</em> can be 
used as the name of the <em>&quot;event&quot;</em>. The <em>&quot;some extra 
information&quot;</em> can be recorded as <code>properties</code> of the 
event.</p><p>The following are some simple examples:</p> <ul> <li>user-1 
signs-up</li> </ul> <div class="highlight json"><table style="border-spacing: 
0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre 
class="lineno">1
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 class="col-md-9 col-sm-12"><div class="content-header hidden-md 
hidden-lg"><div id="breadcrumbs" class="hidden-sm hidden xs"><ul><li><a 
href="#">Collecting and Analyzing Data</a><span 
class="spacer">&gt;</span></li><li><span class="last">Events 
Modeling</span></li></ul></div><div id="page-title"><h1>Events 
Modeling</h1></div></div><div id="table-of-content-wrapper"><h5>On th
 is page</h5><aside id="table-of-contents"><ul> <li> <a 
href="#1-generic-events-performed-by-an-entity">1. Generic events performed by 
an entity</a> </li> <li> <a 
href="#2-special-events-for-recording-changes-of-an-entity-s-properties">2. 
Special events for recording changes of an entity's properties</a> </li> <li> 
<a href="#3-batch-events-to-the-eventserver">3. Batch Events to the 
EventServer</a> </li> </ul> </aside><hr/><a id="edit-page-link" 
href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/datacollection/eventmodel.html.md.erb";><img
 src="/images/icons/edit-pencil-d6c1bb3d.png"/>Edit this page</a></div><div 
class="content-header hidden-sm hidden-xs"><div id="breadcrumbs" 
class="hidden-sm hidden xs"><ul><li><a href="#">Collecting and Analyzing 
Data</a><span class="spacer">&gt;</span></li><li><span class="last">Events 
Modeling</span></li></ul></div><div id="page-title"><h1>Events 
Modeling</h1></div></div><div class="content"> <p>This section expl
 ains how to model your application data as 
events.</p><p><strong>Entity</strong>: it&#39;s the real world object involved 
in the events. The entity may perform the events, or interact with other entity 
(which became <code>targetEntity</code> in an event).</p><p>For example, your 
application may have users and some items which the user can interact with. 
Then you can model them as two entity types: <strong>user</strong> and 
<strong>item</strong> and the entityId can uniquely identify the entity within 
each entityType (e.g. user with ID 1, item with ID 1).</p><p>An entity may 
peform some events (e.g user 1 does something), and entity may have properties 
associated with it (e.g. user may have gender, age, email etc). Hence, 
<strong>events</strong> involve <strong>entities</strong> and there are three 
types of events, respectively:</p> <ol> <li>Generic events performed by an 
entity.</li> <li>Special events for recording changes of an entity&#39;s 
properties</li> <li>Batch events</li> </
 ol> <p>They are explained in details below.</p><h2 
id='1.-generic-events-performed-by-an-entity' class='header-anchors'>1. Generic 
events performed by an entity</h2><p>Whenever the entity performs an action, 
you can describe such event as <code>entity &quot;verb&quot; targetEntity with 
&quot;some extra information&quot;</code>. The 
<em>&quot;targetEntity&quot;</em> and <em>&quot;some extra 
information&quot;</em> can be optional. The <em>&quot;verb&quot;</em> can be 
used as the name of the <em>&quot;event&quot;</em>. The <em>&quot;some extra 
information&quot;</em> can be recorded as <code>properties</code> of the 
event.</p><p>The following are some simple examples:</p> <ul> <li>user-1 
signs-up</li> </ul> <div class="highlight json"><table style="border-spacing: 
0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre 
class="lineno">1
 2
 3
 4
@@ -287,7 +287,7 @@ Content-Length: 41
     },
     …
 ]
-</span></pre></td></tr></tbody></table> </div> <p>Notice that each subrequest 
receives a status response. The limit of 50 events per batch requests is in 
line with Facebook, Mixpanel, SegmentIO and other event syncs that accept 
batches.</p></div></div></div></div><footer><div class="container"><div 
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+</span></pre></td></tr></tbody></table> </div> <p>Notice that each subrequest 
receives a status response. The limit of 50 events per batch requests is in 
line with Facebook, Mixpanel, SegmentIO and other event syncs that accept 
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http://git-wip-us.apache.org/repos/asf/predictionio-site/blob/1edaec49/datacollection/index.html
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diff --git a/datacollection/index.html b/datacollection/index.html
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Server Overview</span></li></ul></div><div id="page-title"><h1>Event Server 
Overview</h1></div></div><div class="content"> <p>Apache PredictionIO offers an 
Event Server that collects data in an event-based style via a RESTful API. By 
default, Event Server uses Apache HBase as data store.</p><p><img 
alt="EventServer Highlight" 
src="/images/eventserver-overview-b4b841d1.png"/></p><h2 id='what-data
 -should-i-collect?' class='header-anchors'>What data should I 
collect?</h2><p>The Event Server can collect and store arbitrary events. At the 
beginning of your project, it is recommended to collect as much data as you 
can. Later on, you can exclude data that are not relevant to your predictive 
model in Data Preparator.</p><h3 id='recommendation-engine' 
class='header-anchors'>Recommendation Engine</h3><p>With Collaborative 
Filtering based Recommendation Engine, a common pattern is</p><div 
class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td 
class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td 
class="code"><pre>user -- action -- item
-</pre></td></tr></tbody></table> </div> <p>where users and items have 
properties associated with them.</p><p>For example, for personalized book 
recommendation, some events to collect would be</p> <ul> <li>User 1 purchased 
product X</li> <li>User 2 viewed product Y</li> <li>User 1 added product Z in 
the cart</li> </ul> <p>User properties can be gender, age, location, etc. Item 
properties can be genre, author, and other attributes that may be related to 
the the user&#39;s preference.</p><p>Data collection varies quite a bit based 
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Overview</span></li></ul></div><div id="page-title"><h1>Event Server 
Overview</h1></div></div><div id="table-of-content
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href="#what-data-should-i-collect">What data should I collect?</a> </li> </ul> 
</aside><hr/><a id="edit-page-link" 
href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/datacollection/index.html.md";><img
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Data</a><span class="spacer">&gt;</span></li><li><span class="last">Event 
Server Overview</span></li></ul></div><div id="page-title"><h1>Event Server 
Overview</h1></div></div><div class="content"> <p>Apache PredictionIO offers an 
Event Server that collects data in an event-based style via a RESTful API. By 
default, Event Server uses Apache HBase as data store.</p><p><img 
alt="EventServer Highlight" 
src="/images/eventserver-overview-b4b841d1.png"/></p><h2 id='what-data-
 should-i-collect?' class='header-anchors'>What data should I 
collect?</h2><p>The Event Server can collect and store arbitrary events. At the 
beginning of your project, it is recommended to collect as much data as you 
can. Later on, you can exclude data that are not relevant to your predictive 
model in Data Preparator.</p><h3 id='recommendation-engine' 
class='header-anchors'>Recommendation Engine</h3><p>With Collaborative 
Filtering based Recommendation Engine, a common pattern is</p><div 
class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td 
class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td 
class="code"><pre>user -- action -- item
+</pre></td></tr></tbody></table> </div> <p>where users and items have 
properties associated with them.</p><p>For example, for personalized book 
recommendation, some events to collect would be</p> <ul> <li>User 1 purchased 
product X</li> <li>User 2 viewed product Y</li> <li>User 1 added product Z in 
the cart</li> </ul> <p>User properties can be gender, age, location, etc. Item 
properties can be genre, author, and other attributes that may be related to 
the the user&#39;s preference.</p><p>Data collection varies quite a bit based 
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