The four attributes of “The Great Treatise on The Stages Of the Path To Enlightenment” are as follow:

[Explanation] that encompasses all the essence of the Buddha’s teachings, completely explaining the stages of the three paths.
[The purpose] of benefitting practitioners with the supreme teachings, the key essence of the comprehensive Dharma.
[The ultimate purpose] that concords with [the purpose] of leading all beings towards complete enlightenment, and finally attaining Buddhahood.
[Interdependence] is referring to the stages of relying on the explanation to achieve the purpose, and then relying on the purpose to achieve the ultimate purpose.