Small error in API reference node_example_node_info?

I was going through the api documentation and the sample node code, when I came across this piece of code for the hook_info sample (link):

<?php
function node_example_node_info() {
  return array(
    'node_example' => array(
      'name' => t('example node'),
      'base' => 'node_example',
      'description' => t("This is an example node type with a few fields.")
    )
  );
}
?>

The api itself, as well as the text mention a module value being required. The sample code mentions a base value instead. Is this a typo in the sample code?