A property binding is a very simple type of binding. It simply binds one component's property to another. When that property changes, the new value is pushed into the property that the binding is set up on.
Why aren't all properties listed? You may notice that the list of properties available to bind to is smaller than the list of all properties. While nearly all properties can be bound, only some properties can be bound to. Only properties for which a propertyChangeEvent is fired may be bound to.