They can be base tables or intermediate result sets.

It is best to append these internal links to the document's base URL so that if you need to loop through the list again (as in the next task), you have a full URL.

Access to the data could then be governed through the view, instead of the base table.

You can also get metrics on your code base.

In fact, you can substitute the base class for every node object, giving your whole application custom behaviors.