diff --git a/index.html b/index.html
index 0993d31..934d8b5 100644
--- a/index.html
+++ b/index.html
@@ -93,6 +93,9 @@
 		</section>
 		<section id="I">
 			<h2>I</h2>
+			<ul>
+				<li><ziba-link>interval data</ziba-link></li>
+			</ul>
 		</section>
 		<section id="J">
 			<h2>J</h2>
@@ -132,6 +135,7 @@
 			<ul>
 				<li><ziba-link>naive bayes</ziba-link></li>
 				<li><ziba-link>natural language processing</ziba-link></li>
+				<li><ziba-link>nominal data</ziba-link></li>
 				<li><ziba-link>non-linear</ziba-link></li>
 			</ul>
 		</section>
@@ -140,6 +144,7 @@
 			<ul>
 				<li><ziba-link>online advertising</ziba-link></li>
 				<li><ziba-link>optical character recognition</ziba-link></li>
+				<li><ziba-link>ordinal data</ziba-link></li>
 			</ul>
 		</section>
 		<section id="P">
@@ -166,6 +171,7 @@
 			<ul>
 				<li><ziba-link>r programming language</ziba-link></li>
 				<li><ziba-link>random forest</ziba-link></li>
+				<li><ziba-link>ratio data</ziba-link></li>
 				<li><ziba-link>recurrent neural network</ziba-link></li>
 				<li><ziba-link>regression</ziba-link></li>
 				<li><ziba-link>reinforcement learning</ziba-link></li>