Inheritance (logical)

• Extends_Relation
• Direct_Extends_Relation
• Nonvirtual_Extends_Relation
• Public_Nonvirtual_Extends_Relation
• Protected_Nonvirtual_Extends_Relation
• Private_Nonvirtual_Extends_Relation
• Virtual_Extends_Relation
• Public_Virtual_Extends_Relation
• Protected_Virtual_Extends_Relation
• Private_Virtual_Extends_Relation
• Indirect_Extends_Relation
• Virtual_Indirect_Extends_Relation
• Nonvirtual_Indirect_Extends_Relation
• Symbol