Mark Struberg There was a slight change in 2.0 from what I recall. The actual wording in 2.0 is a bit different (clearly stating transitivity in specialization):

Formally, a bean X is said to specialize another bean Y if there is either:

• direct specialization, where X directly specializes Y, or
• transitive specialization, where a bean Z exists, such that X directly specializes Z and Z specializes Y.