diff --git a/src/core/01_base.jsx b/src/core/01_base.jsx
index ddc7063..74248a0 100644
--- a/src/core/01_base.jsx
+++ b/src/core/01_base.jsx
@@ -58,6 +58,21 @@ class Lilium {
 		return func;
 	}
 
+	removeElement(a, e) {
+		if(this.isArray(a)) {
+			let index = a.indexOf(e);
+			if(index != -1)
+				return a.splice(index, 1);
+		}
+		return [];
+	}
+
+	clone(a) {
+		if(this.isArray(a))
+			return a.slice(0);	
+		return null;
+	}
+
 	isArray(o) {
 		return Object.prototype.toString.call(o) === '[object Array]';
 	}
diff --git a/src/core/03_properties.jsx b/src/core/03_properties.jsx
index 6d516b6..3214fe2 100644
--- a/src/core/03_properties.jsx
+++ b/src/core/03_properties.jsx
@@ -29,6 +29,139 @@ class PropertySource extends lilium.core.EventSource {
 	}
 }
 
-provides([PropertySource], 'core');
+class TreePropertySourceNode extends lilium.core.EventSource {
+	constructor(name, parent, value) {
+		super();
+		this.parent = parent;
+		if(parent && parent instanceof TreePropertySourceNode) {
+			parent.appendChild(this);
+		}
+		this.name = name;
+		if(value)
+			this.value = value;
+	}
+
+	removeChild(child) {
+		if(child && this.children) {
+			child.parent = null;
+			lilium.removeElement(this.children, child);	
+			events.off(child, 'change'); // Remove all the change listeners
+		}
+	}
+
+	appendChild(child) {
+		if(!this.children)
+			this.children = [];
+		this.children.push(child);
+		child.parent = this;
+	}
+
+	path() {
+		let path = [];
+		let n = this;
+		while(n) {
+			path.unshift(n.name);	
+			n = n.parent;
+		}
+		return path.join('.');
+	}
+
+	/**
+	 * Generate the children tree
+	 */
+	childTree(names) {
+		if(lilium.isArray(names)) {
+			var cs = [];
+			var child = null;
+			while(names.length) {
+				child = this.child(lilium.clone(names));
+				if(child) {
+					break;
+				}
+
+				var n = names.pop();
+				if(n) {
+					cs.unshift(n);
+				}
+			}
+
+			var p = child? child: this;
+			for(let c of cs) {
+				child = new TreePropertySourceNode(c, p);	
+				p = child;
+			}
+			return child;
+		}
+		else {
+			return this.childTree(names.split("."));
+		}
+	}
+
+	/**
+	 * Get the child by its name
+	 */
+	child(names) {
+		if(lilium.isArray(names)) {
+			let node = this;
+			while(names.length) {
+				let n = names.shift();
+				if(n) {
+					node = node.child(n);		
+					if(!node)
+						break;
+				}
+			}
+			if(node != this)
+				return node;
+		}
+		else {
+			if(this.children) {
+				for(let child of this.children) {
+					if(child.name == names)
+						return child;
+				}
+			}
+		}
+		return null;
+	}
+}
+
+class TreePropertySource extends TreePropertySourceNode {
+	get(name, default_value) {
+		let n = this.childTree(name);
+		return n? n.value: default_value;	
+	}
+
+	change(name, func) {
+		var n = this.childTree(name);
+		if(n) {
+			n.addEventListener('change', func);
+		}
+		return this;
+	}
+
+	set(name, value) {
+		var n = this.childTree(name);
+		var event = {
+			'target': n,
+			'currentTarget': n,
+			'propertyName': name,
+			'value': value,	
+			'orig_value': n.value
+		};
+
+		var p = n;
+		// balloon event
+		while(p && !event.stop) {
+			event.currentTarget = p;
+			p.fire('change', event);
+			p = p.parent;
+		}
+
+		n.value = value;
+	}
+}
+
+provides([PropertySource, TreePropertySourceNode, TreePropertySource], 'core');
 
 })();
diff --git a/tests/core/properties_spec.jsx b/tests/core/properties_spec.jsx
index 90885af..87372d5 100644
--- a/tests/core/properties_spec.jsx
+++ b/tests/core/properties_spec.jsx
@@ -6,11 +6,64 @@ class Bean extends lilium.core.PropertySource {
 
 describe("core.properties.suite", function() {
 	it("properties.source.test", function() {
-		var b = new Bean();
+		let b = new Bean();
 		b.addEventListener('change', (e) => {
 			expect(e.propertyName).toBe('a');
 			expect(e.value).toBe(1);
 		})
 		b.set('a', 1);
 	});
+
+	it("properties.tree.node.child.test", function() {
+		let root = new lilium.core.TreePropertySourceNode('root');
+		let branch = new lilium.core.TreePropertySourceNode('branch', root);
+		let leaf = new lilium.core.TreePropertySourceNode('leaf', branch, 1);
+		expect(root.child(['branch', 'leaf']).value).toBe(1);
+	});
+
+	it("properties.tree.node.child.tree.test", function() {
+		let root = new lilium.core.TreePropertySourceNode('root');
+		let leaf = root.childTree('branch.leaf');
+		leaf.value = 1;
+		expect(root.child(['branch', 'leaf']).value).toBe(1);
+		expect(root.childTree('branch.leaf').value).toBe(1);
+
+		let branch = root.child('branch');
+		branch.value = 2;
+
+		let leaf2 = root.childTree('branch.leaf2');
+		expect(leaf2.parent.value).toBe(2);
+	});
+
+	it("properties.tree.node.child.path.test", function() {
+		let root = new lilium.core.TreePropertySourceNode('root');
+		let leaf = root.childTree('branch.leaf');
+		leaf.value = 1;
+		expect(leaf.path()).toBe('root.branch.leaf');
+	});
+
+	it("properties.tree.property.source.base.test", function() {
+		let source = new lilium.core.TreePropertySource();
+		var count = [];
+		source.addEventListener('change', (e) => {
+			count.unshift('ALL');
+		});
+
+		source.change('a', (e) => {
+			count.unshift('a');
+		});
+
+		source.change('a.b', (e) => {
+			count.unshift('a.b');
+		});
+
+		source.change('a.b.c', (e) => {
+			count.unshift('a.b.c');
+		});
+
+		source.set('a.b.c', 1);
+		let c = source.childTree("a.b.c");
+		expect(c.value).toBe(1);
+		expect(count).toEqual(['ALL', 'a', 'a.b', 'a.b.c']);
+	});
 });