diff --git a/doc/10-min.html b/doc/10-min.html
index c84172403..66240fafe 100644
--- a/doc/10-min.html
+++ b/doc/10-min.html
@@ -117,7 +117,7 @@ pageTracker._trackPageview();
   
 <!-- NAVBAR GENERATED FROM template.html BY poki -->
 <button
-  style="font-weight:bold;font-size:100%;color:maroon;border:0"
+  style="font-weight:normal;font-size:100%;color:maroon;border:0"
   padding=0
   onclick="vis_collapse_all_navbar_sections(); vis_toggle_by_name('navbar_section_toggle_overview');"
   href="javascript:;"
@@ -125,7 +125,7 @@ pageTracker._trackPageview();
     Overview
 </button>
 <button
-  style="font-weight:normal;font-size:100%;color:maroon;border:0"
+  style="font-weight:bold;font-size:100%;color:maroon;border:0"
   padding=0
   onclick="vis_collapse_all_navbar_sections(); vis_toggle_by_name('navbar_section_toggle_using');"
   href="javascript:;"
@@ -156,7 +156,7 @@ pageTracker._trackPageview();
   >
     Repository
 </button>
-<div id="navbar_section_toggle_overview" style="display: block;text-align: left">
+<div id="navbar_section_toggle_overview" style="display: none;text-align: left">
 <br/><a href="index.html">About</a>
 <br/><a href="10-min.html"><b>10-minute intro</b></a>
 <br/><a href="file-formats.html">File formats</a>
@@ -164,9 +164,10 @@ pageTracker._trackPageview();
 <br/><a href="record-heterogeneity.html">Record-hetrogeneity</a>
 <br/><a href="internationalization.html">Internationalization</a>
 </div>
-<div id="navbar_section_toggle_using" style="display: none;text-align: left">
+<div id="navbar_section_toggle_using" style="display: block;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html"><b>10-minute intro</b></a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/build.html b/doc/build.html
index 9fa87826e..a6b63f066 100644
--- a/doc/build.html
+++ b/doc/build.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/contact.html b/doc/contact.html
index 5a0b62d22..cab559338 100644
--- a/doc/contact.html
+++ b/doc/contact.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/cookbook.html b/doc/cookbook.html
index 6f947d3bd..53abca146 100644
--- a/doc/cookbook.html
+++ b/doc/cookbook.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: block;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html"><b>Cookbook part 1</b></a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/cookbook2.html b/doc/cookbook2.html
index d25562406..0e334828a 100644
--- a/doc/cookbook2.html
+++ b/doc/cookbook2.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: block;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html"><b>Cookbook part 2</b></a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/cookbook3.html b/doc/cookbook3.html
index 19d262193..9028323be 100644
--- a/doc/cookbook3.html
+++ b/doc/cookbook3.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: block;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html"><b>Cookbook part 3</b></a>
diff --git a/doc/data-examples.html b/doc/data-examples.html
index 6aa72ab51..7a0fd08a6 100644
--- a/doc/data-examples.html
+++ b/doc/data-examples.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: block;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/data-sharing.html b/doc/data-sharing.html
index 77a1f5ab1..d727a3a70 100644
--- a/doc/data-sharing.html
+++ b/doc/data-sharing.html
@@ -10,7 +10,7 @@
   <meta name="keywords"
   content="John Kerl, Kerl, Miller, miller, mlr, OLAP, data analysis software, regression, correlation, variance, data tools, " />
 
-  <title> 10-minute intro </title>
+  <title> Mixing with other languages </title>
   <link rel="stylesheet" type="text/css" href="css2/miller.css"/>
   <link rel="stylesheet" type="text/css" href="css2/poki-callbacks.css"/>
 </head>
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: block;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html"><b>10-minute intro</b></a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html"><b>Mixing with other languages</b></a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
@@ -198,7 +199,7 @@ pageTracker._trackPageview();
 
 <!-- BODY COPIED FROM content-for-data-sharing.html BY poki -->
 <div class="pokitoc">
-<center><titleinbody>10-minute intro</titleinbody></center>
+<center><titleinbody>Mixing with other languages</titleinbody></center>
 &bull;&nbsp;<a href="#DKVP_I/O_in_Python">DKVP I/O in Python</a><br/>
 &bull;&nbsp;<a href="#DKVP_I/O_in_Ruby">DKVP I/O in Ruby</a><br/>
 &bull;&nbsp;<a href="#SQL-output_examples">SQL-output examples</a><br/>
@@ -569,11 +570,11 @@ wye pan 5 0.5732889198020006  0.8636244699032729  14ba3c3e96a2474ab6dc7409ebf9d6
 <pre>
 $ mlr --opprint put '$t=system("date +%s.%N")' then step -a delta -f t data/small
 a   b   i x                   y                   t                    t_delta
-pan pan 1 0.3467901443380824  0.7268028627434533  1568773890.746609440 0
-eks pan 2 0.7586799647899636  0.5221511083334797  1568773890.747514111 0.000905
-wye wye 3 0.20460330576630303 0.33831852551664776 1568773890.748402155 0.000888
-eks wye 4 0.38139939387114097 0.13418874328430463 1568773890.749289244 0.000887
-wye pan 5 0.5732889198020006  0.8636244699032729  1568773890.750172561 0.000883
+pan pan 1 0.3467901443380824  0.7268028627434533  1568774318.513903817 0
+eks pan 2 0.7586799647899636  0.5221511083334797  1568774318.514722876 0.000819
+wye wye 3 0.20460330576630303 0.33831852551664776 1568774318.515618046 0.000895
+eks wye 4 0.38139939387114097 0.13418874328430463 1568774318.516547441 0.000929
+wye pan 5 0.5732889198020006  0.8636244699032729  1568774318.517518828 0.000971
 </pre>
 </div>
 <p/>
@@ -582,11 +583,11 @@ wye pan 5 0.5732889198020006  0.8636244699032729  1568773890.750172561 0.000883
 <pre>
 $ mlr --opprint put '$t=systime()' then step -a delta -f t data/small
 a   b   i x                   y                   t                 t_delta
-pan pan 1 0.3467901443380824  0.7268028627434533  1568773890.751365 0
-eks pan 2 0.7586799647899636  0.5221511083334797  1568773890.751383 0.000018
-wye wye 3 0.20460330576630303 0.33831852551664776 1568773890.751389 0.000006
-eks wye 4 0.38139939387114097 0.13418874328430463 1568773890.751392 0.000003
-wye pan 5 0.5732889198020006  0.8636244699032729  1568773890.751396 0.000004
+pan pan 1 0.3467901443380824  0.7268028627434533  1568774318.518699 0
+eks pan 2 0.7586799647899636  0.5221511083334797  1568774318.518717 0.000018
+wye wye 3 0.20460330576630303 0.33831852551664776 1568774318.518723 0.000006
+eks wye 4 0.38139939387114097 0.13418874328430463 1568774318.518727 0.000004
+wye pan 5 0.5732889198020006  0.8636244699032729  1568774318.518730 0.000003
 </pre>
 </div>
 <p/>
diff --git a/doc/etymology.html b/doc/etymology.html
index 422c24885..0b2ecbb92 100644
--- a/doc/etymology.html
+++ b/doc/etymology.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/faq.html b/doc/faq.html
index ed3c384ac..39c89d890 100644
--- a/doc/faq.html
+++ b/doc/faq.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: block;text-align: left">
 <br/><a href="faq.html"><b>FAQ</b></a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/feature-comparison.html b/doc/feature-comparison.html
index b96ceb66c..fe293da0f 100644
--- a/doc/feature-comparison.html
+++ b/doc/feature-comparison.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/file-formats.html b/doc/file-formats.html
index b8cbfb902..f546afc69 100644
--- a/doc/file-formats.html
+++ b/doc/file-formats.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/index.html b/doc/index.html
index 887fb2bb9..5a98d08c2 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/internationalization.html b/doc/internationalization.html
index 19f91dcb7..cd85b04f8 100644
--- a/doc/internationalization.html
+++ b/doc/internationalization.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/manpage.html b/doc/manpage.html
index 306a151f0..794d7f8ce 100644
--- a/doc/manpage.html
+++ b/doc/manpage.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/originality.html b/doc/originality.html
index 00672904d..496a3ec1e 100644
--- a/doc/originality.html
+++ b/doc/originality.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/performance.html b/doc/performance.html
index 9a7094e6f..1826770d6 100644
--- a/doc/performance.html
+++ b/doc/performance.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/poki-cfg.json b/doc/poki-cfg.json
index 30f2ea0a4..fe0666e85 100644
--- a/doc/poki-cfg.json
+++ b/doc/poki-cfg.json
@@ -43,6 +43,10 @@
         },
         {
           "external_name": "10-minute intro",
+          "file_name": "10-min.html"
+        },
+        {
+          "external_name": "Mixing with other languages",
           "file_name": "data-sharing.html"
         },
         {
diff --git a/doc/record-heterogeneity.html b/doc/record-heterogeneity.html
index e07f86210..2f1ebb678 100644
--- a/doc/record-heterogeneity.html
+++ b/doc/record-heterogeneity.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/reference-dsl.html b/doc/reference-dsl.html
index 92961f00b..f9620d2d4 100644
--- a/doc/reference-dsl.html
+++ b/doc/reference-dsl.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/reference-verbs.html b/doc/reference-verbs.html
index 1292241f8..c248350ce 100644
--- a/doc/reference-verbs.html
+++ b/doc/reference-verbs.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/reference.html b/doc/reference.html
index fffb4081c..7347f57c3 100644
--- a/doc/reference.html
+++ b/doc/reference.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/release-docs.html b/doc/release-docs.html
index dc736ad33..bf812767f 100644
--- a/doc/release-docs.html
+++ b/doc/release-docs.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/why.html b/doc/why.html
index faa333236..0fcb4e0cc 100644
--- a/doc/why.html
+++ b/doc/why.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>
diff --git a/doc/whyc.html b/doc/whyc.html
index 4931dc68a..602a3061e 100644
--- a/doc/whyc.html
+++ b/doc/whyc.html
@@ -166,7 +166,8 @@ pageTracker._trackPageview();
 </div>
 <div id="navbar_section_toggle_using" style="display: none;text-align: left">
 <br/><a href="faq.html">FAQ</a>
-<br/><a href="data-sharing.html">10-minute intro</a>
+<br/><a href="10-min.html">10-minute intro</a>
+<br/><a href="data-sharing.html">Mixing with other languages</a>
 <br/><a href="cookbook.html">Cookbook part 1</a>
 <br/><a href="cookbook2.html">Cookbook part 2</a>
 <br/><a href="cookbook3.html">Cookbook part 3</a>