diff --git a/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/model/Constants.java b/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/model/Constants.java
new file mode 100644
index 0000000..9cbf274
--- /dev/null
+++ b/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/model/Constants.java
@@ -0,0 +1,23 @@
+package org.nittalab.dtram.languageserver.model;
+
+/**
+ * {@link Constants} class holds all constants values used in DTRAM.
+ *
+ * @author Shohei Yamagiwa
+ * @since 0.1
+ */
+public class Constants {
+    /**
+     * Constants for language specific.
+     */
+    public static final String NIL = "nil";
+    public static final String NULL = "null";
+    public static final String TRUE = "true";
+    public static final String FALSE = "false";
+
+    /**
+     * Constants for Math
+     */
+    public static final String PI = "PI";
+    public static final String E = "E";
+}