Routing in Drupal 8 for basic pages I've just begun the transition process from D7 to D8.  I installed D8 and added a basic page w/ a menu link.  I then began to explore the new D8 routing system and expected to find a .yml file that contained information about where to find the added page but I don't see it. This is not a added module so it doesn't have a moduleName.routing.yml.

I'm looking for a conceptual description of why this does or doesn't follow the new .yml convention.
Node routes are declared using what is known as a route provider.
The node route provider class is \Drupal\node\Entity\NodeRouteProvider and it is declared in the annotation of the node class:

/*
 * @ContentEntityType(
 *   id = "node",
 *   label = @Translation("Content"),
 *   bundle_label = @Translation("Content type"),
 *   handlers = {
 *     ...
 *     "route_provider" = {
 *       "html" = "Drupal\node\Entity\NodeRouteProvider",
 *     },
 *     ...
 */
class Node extends ContentEntityBase implements NodeInterface {
//  ...
}