diff -r 000000000000 -r c2293ae622df histogram/src/main/java/dew/demo/histogram/DataModel.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/histogram/src/main/java/dew/demo/histogram/DataModel.java	Sun Nov 17 09:46:45 2013 +0100
@@ -0,0 +1,80 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2013 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package dew.demo.histogram;
+
+import java.util.ArrayList;
+import java.util.List;
+import net.java.html.json.ComputedProperty;
+import net.java.html.json.Model;
+import net.java.html.json.Property;
+
+/** Model annotation generates class Data with 
+ * one property for list of of numbers and read-only property
+ * for ten of bars.
+ */
+@Model(className = "Data", properties = {
+    @Property(name = "numbers", type = String.class)
+})
+final class DataModel {
+    @ComputedProperty static java.util.List<Bar> bars(String numbers) {
+        List<Bar> arr = new ArrayList<Bar>(10);
+        for (int i = 0; i < 10; i++) {
+            arr.add(new Bar(i, 0));
+        }
+        String[] words = numbers == null ? new String[0] : numbers.split(" ");
+        for (String word : words) {
+            try {
+                double n = Double.parseDouble(word);
+                if (n > 99) {
+                    n = 99;
+                } else if (n <= 0) {
+                    n = 0;
+                }
+                Bar b = arr.get((int) (n / 10));
+                b.setValue(b.getValue() + 1);
+            }catch (NumberFormatException ex) {
+                // ignore
+            }
+        }
+        return arr;
+    }
+
+    @Model(className = "Bar", properties = {
+        @Property(name = "index", type = int.class),
+        @Property(name = "value", type = int.class)
+    })
+    static class BarModel {
+        @ComputedProperty static String left(int index) {
+            return (index * 50 + 20) + "px";
+        }
+        
+        @ComputedProperty static String top(int value) {
+            return (199 - value * 20) + "px";
+        }
+        
+        @ComputedProperty static String height(int value) {
+            return 20 * value + "px";
+        }
+    }
+}