Q1: Will content types in Drupal7 support inheritance ? Q2: Will content types in Drupal7 support Interfaces and AbstractTypes ?

Q1: Will content types in Drupal7 support inheritance ?

Q2: Will content types in Drupal7 support Interfaces and AbstractTypes ?

Please note that I have commenced modeling selected elements of the Drupal6 system in graphical Unified Modeling Language (UML), with binding between Drupal docs and UML models and diagrams. I am not familiar with the Drupal7 effort at all yet.