These are objects that would remain meaningless out of a context. Such an object in the example above is the Products Ordered object. This object exists only in the context of an order – if there ws no order, this object would be meaningless. This is why Elements shows these objects only in the form of the related parent object (in this case – order). These objects, should the developer decide so, can also be accessed from the menu, but the platform will not allow adding records out of this context.