diff -r 3299d5335b8f json/src/main/java/org/netbeans/html/json/impl/Bindings.java
--- a/json/src/main/java/org/netbeans/html/json/impl/Bindings.java	Thu Nov 20 14:59:04 2014 +0100
+++ b/json/src/main/java/org/netbeans/html/json/impl/Bindings.java	Wed Nov 26 22:20:33 2014 +0100
@@ -60,8 +60,11 @@
         this.bp = bp;
     }
     
-    public <M> PropertyBinding registerProperty(String propName, int index, M model, Proto.Type<M> access, boolean readOnly) {
-        return PropertyBindingAccessor.create(access, this, propName, index, model, readOnly);
+    public <M> PropertyBinding registerProperty(
+            String propName, int index, M model,
+            Proto.Type<M> access, boolean readOnly, Class<?> type
+    ) {
+        return PropertyBindingAccessor.create(access, this, propName, index, model, readOnly, type);
     }
 
     public static Bindings<?> apply(BrwsrCtx c, Object model) {
diff -r 3299d5335b8f json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java
--- a/json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java	Thu Nov 20 14:59:04 2014 +0100
+++ b/json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java	Wed Nov 26 22:20:33 2014 +0100
@@ -320,6 +320,7 @@
                 {
                     for (int i = 0; i < propsGetSet.size(); i++) {
                         w.append("      registerProperty(\"").append(propsGetSet.get(i).name).append("\", ");
+                        w.append(propsGetSet.get(i).type).append(".class, ");
                         w.append((i) + ", " + propsGetSet.get(i).readOnly + ");\n");
                     }
                 }
diff -r 3299d5335b8f json/src/main/java/org/netbeans/html/json/impl/PropertyBindingAccessor.java
--- a/json/src/main/java/org/netbeans/html/json/impl/PropertyBindingAccessor.java	Thu Nov 20 14:59:04 2014 +0100
+++ b/json/src/main/java/org/netbeans/html/json/impl/PropertyBindingAccessor.java	Wed Nov 26 22:20:33 2014 +0100
@@ -65,8 +65,10 @@
     }
 
     protected abstract <M> PropertyBinding newBinding(
-        Proto.Type<M> access, Bindings<?> bindings, String name, int index, M model, boolean readOnly
+            Proto.Type<M> access, Bindings<?> bindings, String name, 
+            int index, M model, boolean readOnly, Class<?> type
     );
+    
     protected abstract JSONCall newCall(
         BrwsrCtx ctx, RcvrJSON callback, String urlBefore, String urlAfter,
         String method, Object data
@@ -87,9 +89,10 @@
     }
     
     static <M> PropertyBinding create(
-        Proto.Type<M> access, Bindings<?> bindings, String name, int index, M model , boolean readOnly
+            Proto.Type<M> access, Bindings<?> bindings, String name,
+            int index, M model, boolean readOnly, Class<?> type
     ) {
-        return DEFAULT.newBinding(access, bindings, name, index, model, readOnly);
+        return DEFAULT.newBinding(access, bindings, name, index, model, readOnly, type);
     }
     static JSONCall createCall(
         BrwsrCtx ctx, RcvrJSON callback, String urlBefore, String urlAfter, 
diff -r 3299d5335b8f json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java
--- a/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java	Thu Nov 20 14:59:04 2014 +0100
+++ b/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java	Wed Nov 26 22:20:33 2014 +0100
@@ -91,10 +91,10 @@
 
             @Override
             protected <M> PropertyBinding newBinding(
-                Proto.Type<M> access, Bindings<?> bindings, String name,
-                int index, M model, boolean readOnly
+                    Proto.Type<M> access, Bindings<?> bindings,
+                    String name, int index, M model, boolean readOnly, Class<?> type
             ) {
-                return new Impl(bindings, name, index, model, access, readOnly);
+                return new Impl(bindings, name, index, model, access, readOnly, type);
             }
         };
     }
@@ -125,6 +125,14 @@
      */
     public abstract boolean isReadOnly();
     
+    /** The type of the property. This is the type one can expect
+     * when {@link #getValue() getValue} method is called. In case the type
+     * is not known, return {@link Object}.
+     * @return a class of the type of the property
+     * @since 1.1
+     */
+    public abstract Class<?> type();
+    
     private static final class Impl<M> extends PropertyBinding {
         public final String name;
         public final boolean readOnly;
@@ -132,14 +140,19 @@
         private final Proto.Type<M> access;
         private final Bindings<?> bindings;
         private final int index;
+        private final Class<?> type;
 
-        public Impl(Bindings<?> bindings, String name, int index, M model, Proto.Type<M> access, boolean readOnly) {
+        public Impl(
+            Bindings<?> bindings, String name, int index, 
+            M model, Proto.Type<M> access, boolean readOnly, Class<?> type
+        ) {
             this.bindings = bindings;
             this.name = name;
             this.index = index;
             this.model = model;
             this.access = access;
             this.readOnly = readOnly;
+            this.type = type;
         }
 
         @Override
@@ -163,6 +176,11 @@
         public String getPropertyName() {
             return name;
         }
+
+        @Override
+        public Class<?> type() {
+            return type;
+        }
     } // end of PBData
     
 }
diff -r 3299d5335b8f json/src/main/java/org/netbeans/html/json/spi/Proto.java
--- a/json/src/main/java/org/netbeans/html/json/spi/Proto.java	Thu Nov 20 14:59:04 2014 +0100
+++ b/json/src/main/java/org/netbeans/html/json/spi/Proto.java	Wed Nov 26 22:20:33 2014 +0100
@@ -461,7 +461,9 @@
             PropertyBinding[] pb = new PropertyBinding[type.propertyNames.length];
             for (int i = 0; i < pb.length; i++) {
                 pb[i] = b.registerProperty(
-                    type.propertyNames[i], i, obj, type, type.propertyReadOnly[i]
+                    type.propertyNames[i], i, obj, type, 
+                    type.propertyReadOnly[i],
+                    type.propertyTypes[i]
                 );
             }
             FunctionBinding[] fb = new FunctionBinding[type.functions.length];
@@ -500,6 +502,7 @@
     public static abstract class Type<Model> {
         private final Class<Model> clazz;
         private final String[] propertyNames;
+        private final Class[] propertyTypes;
         private final boolean[] propertyReadOnly;
         private final String[] functions;
 
@@ -522,6 +525,7 @@
             }
             this.clazz = clazz;
             this.propertyNames = new String[properties];
+            this.propertyTypes = new Class[properties];
             this.propertyReadOnly = new boolean[properties];
             this.functions = new String[functions];
             JSON.register(clazz, this);
@@ -535,8 +539,24 @@
          * @param readOnly is the property read only?
          */
         protected final void registerProperty(String name, int index, boolean readOnly) {
+            registerProperty(name, Object.class, index, readOnly);
+        }
+        
+        /** Registers property for the type. It is expected each index
+         * is initialized only once.
+         * 
+         * @param name name of the property
+         * @param type class type of the property
+         * @param index index of the property
+         * @param readOnly is the property read only?
+         * @since 1.1
+         */
+        protected final void registerProperty(
+            String name, Class<?> type, int index, boolean readOnly
+        ) {
             assert propertyNames[index] == null;
             propertyNames[index] = name;
+            propertyTypes[index] = type;
             propertyReadOnly[index] = readOnly;
         }
 
diff -r 3299d5335b8f json/src/test/java/net/java/html/json/MapModelTest.java
--- a/json/src/test/java/net/java/html/json/MapModelTest.java	Thu Nov 20 14:59:04 2014 +0100
+++ b/json/src/test/java/net/java/html/json/MapModelTest.java	Wed Nov 26 22:20:33 2014 +0100
@@ -85,6 +85,7 @@
         One o = (One)v;
         assertEquals(o.changes, 1, "One change so far");
         assertFalse(o.pb.isReadOnly(), "Mutable property");
+        assertEquals(o.pb.type(), String.class, "Type is string");
         
         assertEquals(o.get(), "Jarda", "Value should be in the map");
         
@@ -132,6 +133,7 @@
         One o = (One)v;
         
         o.set("FEMALE");
+        assertEquals(o.pb.type(), Sex.class, "enum type");
 
         assertEquals(p.getSex(), Sex.FEMALE, "Changed to female");
     }