A.hx

class A
{
	public var aString:String;

	public var innerString : String;

	public var anotherInnerString : String;
	
	@hxmrDefaultProperty public var children : Array<B>;

	public function new()
	{

	}
	
}

Test.hx

class ml.Test extends A{
  public new(method) : Void -> Void

	 = function() = {
		super();
		this.myString = "Hello again!";
		this.myB = this.init_myB();
		this.aString = "1";
		this.innerString = "Hello!";
		this.anotherInnerString = Std.string(this.myString);
		this.children = this.init_children();
	};

	init_children(method) : Void -> Array<deep.B>

	 = function() = {
		if ((this.children != null))return this.children);
		this.children = new Array();
		return this.children;
	};

	init_myB(method) : Void -> deep.B

	 = function() = {
		if ((this.myB != null))return this.myB);
		this.myB = new deep.B();
		return this.myB;
	};

	public myB(var) : deep.B;

	public myString(var) : String;

}

Test.mxml

<?xml version="1.0" encoding="utf-8" ?>
<ans:A ans:aString="1" xmlns:ans="*">
  
	<B id="myB"  xmlns="deep.*" test="123" prop="asValue"/>

	<ans:innerString>Hello!</ans:innerString>
	
	<ans:anotherInnerString>
		<String id="myString">Hello again!</String>
	</ans:anotherInnerString>
</ans:A>