http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/ce452ddb/userguide/misc/funcs.html
----------------------------------------------------------------------
diff --git a/userguide/misc/funcs.html b/userguide/misc/funcs.html
index fa99579..6b4910a 100644
--- a/userguide/misc/funcs.html
+++ b/userguide/misc/funcs.html
@@ -125,7 +125,7 @@
     
         
         <li>
-            <a href="http://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
         </li>
     
     
@@ -2585,7 +2585,7 @@
 Google Maps: https://www.google.com/maps/@${lat},${lon},${zoom}z
 </code></pre></li>
 <li><p><code>tile(double lat, double lon, int zoom)</code>::bigint - Returns a 
tile number 2^2n where n is zoom level. <em>FUNC</em>(lat,lon,zoom) = 
xtile(lon,zoom) + ytile(lat,zoom) * 2^zoom</p>
-<pre><code>refer http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames for 
detail
+<pre><code>refer https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames for 
detail
 </code></pre></li>
 <li><p><code>tilex2lon(int x, int zoom)</code>::double - Returns longitude of 
the given tile x and zoom level</p>
 </li>
@@ -2863,7 +2863,7 @@ Apache Hivemall is an effort undergoing incubation at The 
Apache Software Founda
     <script>
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http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/ce452ddb/userguide/misc/generic_funcs.html
----------------------------------------------------------------------
diff --git a/userguide/misc/generic_funcs.html 
b/userguide/misc/generic_funcs.html
index 572562e..cabd5bc 100644
--- a/userguide/misc/generic_funcs.html
+++ b/userguide/misc/generic_funcs.html
@@ -125,7 +125,7 @@
     
         
         <li>
-            <a href="http://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
         </li>
     
     
@@ -2835,7 +2835,7 @@
 </li>
 <li><p><code>each_top_k(int K, Object group, double cmpKey, *)</code> - 
Returns top-K values (or tail-K values when k is less than 0)</p>
 </li>
-<li><p><code>generate_series(const int|bigint start, const int|bigint 
end)</code> - Generate a series of values, from start to end. A similar 
function to PostgreSQL&apos;s <a 
href="http://www.postgresql.org/docs/current/static/functions-srf.html"; 
target="_blank">generate_serics</a></p>
+<li><p><code>generate_series(const int|bigint start, const int|bigint 
end)</code> - Generate a series of values, from start to end. A similar 
function to PostgreSQL&apos;s <a 
href="https://www.postgresql.org/docs/current/static/functions-srf.html"; 
target="_blank">generate_serics</a></p>
 <pre><code class="lang-sql"><span class="hljs-keyword">SELECT</span> 
generate_series(<span class="hljs-number">2</span>,<span 
class="hljs-number">4</span>);
 
  2
@@ -2938,7 +2938,7 @@ Apache Hivemall is an effort undergoing incubation at The 
Apache Software Founda
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http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/ce452ddb/userguide/misc/tokenizer.html
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diff --git a/userguide/misc/tokenizer.html b/userguide/misc/tokenizer.html
index 1ea524f..2a7a757 100644
--- a/userguide/misc/tokenizer.html
+++ b/userguide/misc/tokenizer.html
@@ -125,7 +125,7 @@
     
         
         <li>
-            <a href="http://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
         </li>
     
     
@@ -2342,7 +2342,7 @@
 </blockquote>
 <p>For detailed APIs, please refer Javadoc of <a 
href="https://lucene.apache.org/core/5_3_1/analyzers-kuromoji/org/apache/lucene/analysis/ja/JapaneseAnalyzer.html";
 target="_blank">JapaneseAnalyzer</a> as well.</p>
 <h2 id="chinese-tokenizer">Chinese Tokenizer</h2>
-<p>Chinese text tokenizer UDF uses <a 
href="http://lucene.apache.org/core/5_3_1/analyzers-smartcn/org/apache/lucene/analysis/cn/smart/SmartChineseAnalyzer.html";
 target="_blank">SmartChineseAnalyzer</a>. </p>
+<p>Chinese text tokenizer UDF uses <a 
href="https://lucene.apache.org/core/5_3_1/analyzers-smartcn/org/apache/lucene/analysis/cn/smart/SmartChineseAnalyzer.html";
 target="_blank">SmartChineseAnalyzer</a>. </p>
 <p>The signature of the UDF is as follows:</p>
 <pre><code class="lang-sql">tokenize_cn(string line, optional const 
array&lt;string&gt; stopWords)
 </code></pre>
@@ -2352,7 +2352,7 @@
 <blockquote>
 <p>[smartcn, &#x4E3A;, apach, 2, 0, &#x534F;&#x8BAE;, &#x7684;, 
&#x5F00;&#x6E90;, &#x4E2D;&#x6587;, &#x5206;&#x8BCD;, &#x7CFB;&#x7EDF;, java, 
&#x8BED;&#x8A00;, &#x7F16;&#x5199;, &#x4FEE;&#x6539;, &#x7684;, 
&#x4E2D;&#x79D1;&#x9662;, &#x8BA1;&#x7B97;, &#x6240;, ictcla, &#x5206;&#x8BCD;, 
&#x7CFB;&#x7EDF;]</p>
 </blockquote>
-<p>For detailed APIs, please refer Javadoc of <a 
href="http://lucene.apache.org/core/5_3_1/analyzers-smartcn/org/apache/lucene/analysis/cn/smart/SmartChineseAnalyzer.html";
 target="_blank">SmartChineseAnalyzer</a> as well.</p>
+<p>For detailed APIs, please refer Javadoc of <a 
href="https://lucene.apache.org/core/5_3_1/analyzers-smartcn/org/apache/lucene/analysis/cn/smart/SmartChineseAnalyzer.html";
 target="_blank">SmartChineseAnalyzer</a> as well.</p>
 <p><div id="page-footer" class="localized-footer"><hr><!--
   Licensed to the Apache Software Foundation (ASF) under one
   or more contributor license agreements.  See the NOTICE file
@@ -2408,7 +2408,7 @@ Apache Hivemall is an effort undergoing incubation at The 
Apache Software Founda
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http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/ce452ddb/userguide/misc/topk.html
----------------------------------------------------------------------
diff --git a/userguide/misc/topk.html b/userguide/misc/topk.html
index 16648f6..4392564 100644
--- a/userguide/misc/topk.html
+++ b/userguide/misc/topk.html
@@ -125,7 +125,7 @@
     
         
         <li>
-            <a href="http://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
         </li>
     
     
@@ -2311,7 +2311,7 @@
 <li>The third argument <code>value</code> is used for the comparison.</li>
 <li><code>Any number types</code> or <code>timestamp</code> are accepted for 
the type of <code>value</code>.</li>
 <li>If k is less than 0, reverse order is used and <code>tail-K</code> records 
are returned for each <code>group</code>.</li>
-<li>Note that this function returns <a 
href="http://www.michaelpollmeier.com/selecting-top-k-items-from-a-list-efficiently-in-java-groovy/";
 target="_blank">a pseudo ranking</a> for top-k. It always returns 
<code>at-most K</code> records for each group. The ranking scheme is similar to 
<code>dense_rank</code> but slightly different in certain cases.</li>
+<li>Note that this function returns <a 
href="https://www.michaelpollmeier.com/selecting-top-k-items-from-a-list-efficiently-in-java-groovy/";
 target="_blank">a pseudo ranking</a> for top-k. It always returns 
<code>at-most K</code> records for each group. The ranking scheme is similar to 
<code>dense_rank</code> but slightly different in certain cases.</li>
 </ul>
 <h1 id="usage">Usage</h1>
 <h2 id="efficient-top-k-query-processing-using-eachtopk">Efficient Top-k Query 
Processing using <code>each_top_k</code></h2>
@@ -2431,7 +2431,7 @@ Do null hanlding like <code>if(value is null, -1, 
value)</code> to avoid null.</
 <p>The ranking semantics of <code>each_top_k</code> follows SQL&apos;s 
<code>dense_rank</code> and then limits results by <code>k</code>. </p>
 <div class="panel panel-warning"><div class="panel-heading"><h3 
class="panel-title" id="caution"><i class="fa fa-exclamation-triangle"></i> 
Caution</h3></div><div class="panel-body"><p><code>each_top_k</code> is 
benefical where the number of grouping keys are large. If the number of 
grouping keys are not so large (e.g., less than 100), consider using 
<code>rank() over</code> instead.</p></div></div>
 <h2 id="top-k-clicks">top-k clicks</h2>
-<p><a 
href="http://stackoverflow.com/questions/9390698/hive-getting-top-n-records-in-group-by-query/32559050#32559050";
 
target="_blank">http://stackoverflow.com/questions/9390698/hive-getting-top-n-records-in-group-by-query/32559050#32559050</a></p>
+<p><a 
href="https://stackoverflow.com/questions/9390698/hive-getting-top-n-records-in-group-by-query/32559050#32559050";
 
target="_blank">https://stackoverflow.com/questions/9390698/hive-getting-top-n-records-in-group-by-query/32559050#32559050</a></p>
 <pre><code class="lang-sql"><span class="hljs-keyword">set</span> 
hivevar:k=<span class="hljs-number">5</span>;
 
 <span class="hljs-keyword">select</span>
@@ -3123,7 +3123,7 @@ Apache Hivemall is an effort undergoing incubation at The 
Apache Software Founda
     <script>
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http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/ce452ddb/userguide/multiclass/iris.html
----------------------------------------------------------------------
diff --git a/userguide/multiclass/iris.html b/userguide/multiclass/iris.html
index 75edd10..6439756 100644
--- a/userguide/multiclass/iris.html
+++ b/userguide/multiclass/iris.html
@@ -125,7 +125,7 @@
     
         
         <li>
-            <a href="http://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
         </li>
     
     
@@ -2336,7 +2336,7 @@ Apache Hivemall is an effort undergoing incubation at The 
Apache Software Founda
     <script>
         var gitbook = gitbook || [];
         gitbook.push(function() {
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Tutorial","level":"7.2","depth":1,"next":{"title":"Data 
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http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/ce452ddb/userguide/multiclass/iris_dataset.html
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diff --git a/userguide/multiclass/iris_dataset.html 
b/userguide/multiclass/iris_dataset.html
index 7d786d0..10d3c22 100644
--- a/userguide/multiclass/iris_dataset.html
+++ b/userguide/multiclass/iris_dataset.html
@@ -125,7 +125,7 @@
     
         
         <li>
-            <a href="http://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
         </li>
     
     
@@ -2356,7 +2356,7 @@ from
 &gt; 2       Iris-setosa     
[&quot;1:0.16666664&quot;,&quot;2:0.41666666&quot;,&quot;3:0.0677966&quot;,&quot;4:0.041666664&quot;,&quot;0:1.0&quot;]
 &gt; 3       Iris-setosa     
[&quot;1:0.11111101&quot;,&quot;2:0.5&quot;,&quot;3:0.05084745&quot;,&quot;4:0.041666664&quot;,&quot;0:1.0&quot;]
 </code></pre>
-<p><em><a 
href="http://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass.html#iris";
 target="_blank">LibSVM web page</a> provides a normalized (using <a 
href="../ft_engineering/scaling.html#feature-scaling-by-zscore">ZScore</a>) 
version of Iris dataset.</em></p>
+<p><em><a 
href="https://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass.html#iris";
 target="_blank">LibSVM web page</a> provides a normalized (using <a 
href="../ft_engineering/scaling.html#feature-scaling-by-zscore">ZScore</a>) 
version of Iris dataset.</em></p>
 <h1 id="create-trainingtest-data">Create training/test data</h1>
 <pre><code class="lang-sql"><span class="hljs-keyword">set</span> 
hivevar:rand_seed=<span class="hljs-number">31</span>;
 
@@ -2452,7 +2452,7 @@ Apache Hivemall is an effort undergoing incubation at The 
Apache Software Founda
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diff --git a/userguide/multiclass/iris_randomforest.html 
b/userguide/multiclass/iris_randomforest.html
index 4eca9df..46b11d7 100644
--- a/userguide/multiclass/iris_randomforest.html
+++ b/userguide/multiclass/iris_randomforest.html
@@ -125,7 +125,7 @@
     
         
         <li>
-            <a href="http://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
         </li>
     
     
@@ -2587,7 +2587,7 @@ WITH t1 as (
 <h1 id="graphviz-export">Graphviz export</h1>
 <div class="panel panel-primary"><div class="panel-heading"><h3 
class="panel-title" id="note"><i class="fa fa-edit"></i> Note</h3></div><div 
class="panel-body"><p><code>tree_export</code> feature is supported from 
Hivemall v0.5.0 or later.
 Better to limit tree depth on training by <code>-depth</code> option to plot a 
Decision Tree.</p></div></div>
-<p>Hivemall provide <code>tree_export</code> to export a decision tree into <a 
href="http://www.graphviz.org/"; target="_blank">Graphviz</a> or human-readable 
Javascript format. You can find the usage by issuing the following query:</p>
+<p>Hivemall provide <code>tree_export</code> to export a decision tree into <a 
href="https://www.graphviz.org/"; target="_blank">Graphviz</a> or human-readable 
Javascript format. You can find the usage by issuing the following query:</p>
 <pre><code>&gt; select tree_export(&quot;&quot;,&quot;-help&quot;);
 
 usage: tree_export(string model, const string options, optional
@@ -2641,7 +2641,7 @@ usage: tree_export(string model, const string options, 
optional
  8 -&gt; 12;
 }
 </code></pre><p><img src="../resources/images/iris.png" alt="Iris Graphviz 
output"></p>
-<p>You can draw a graph by <code>dot -Tpng iris.dot -o iris.png</code> or 
using <a href="http://viz-js.com/"; target="_blank">Viz.js</a>.</p>
+<p>You can draw a graph by <code>dot -Tpng iris.dot -o iris.png</code> or 
using <a href="https://viz-js.com/"; target="_blank">Viz.js</a>.</p>
 <p><div id="page-footer" class="localized-footer"><hr><!--
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diff --git a/userguide/multiclass/iris_scw.html 
b/userguide/multiclass/iris_scw.html
index 3cb3b54..a039049 100644
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+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
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Apache Software Founda
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diff --git a/userguide/multiclass/news20.html b/userguide/multiclass/news20.html
index 87b1372..89b493b 100644
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http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/ce452ddb/userguide/multiclass/news20_dataset.html
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diff --git a/userguide/multiclass/news20_dataset.html 
b/userguide/multiclass/news20_dataset.html
index 5f2771c..25e4825 100644
--- a/userguide/multiclass/news20_dataset.html
+++ b/userguide/multiclass/news20_dataset.html
@@ -125,7 +125,7 @@
     
         
         <li>
-            <a href="http://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
         </li>
     
     
@@ -2282,7 +2282,7 @@
   under the License.
 -->
 <p>Get the news20 dataset.
-<a 
href="http://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass.html#news20";
 
target="_blank">http://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass.html#news20</a></p>
+<a 
href="https://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass.html#news20";
 
target="_blank">https://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass.html#news20</a></p>
 <pre><code class="lang-sh">$ cat &lt;&lt;EOF &gt; conv.awk
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@@ -2407,7 +2407,7 @@ Apache Hivemall is an effort undergoing incubation at The 
Apache Software Founda
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http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/ce452ddb/userguide/multiclass/news20_ensemble.html
----------------------------------------------------------------------
diff --git a/userguide/multiclass/news20_ensemble.html 
b/userguide/multiclass/news20_ensemble.html
index d05f62c..366a0a6 100644
--- a/userguide/multiclass/news20_ensemble.html
+++ b/userguide/multiclass/news20_ensemble.html
@@ -125,7 +125,7 @@
     
         
         <li>
-            <a href="http://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
+            <a href="https://hivemall.incubator.apache.org/"; target="_blank" 
class="custom-link"><i class="fa fa-home"></i> Home</a>
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@@ -2528,7 +2528,7 @@ Apache Hivemall is an effort undergoing incubation at The 
Apache Software Founda
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