瑜伽論記 9.315

9.315

別解中，先解能變；後解能化。前變中，初問；次解；後結。解中，初開十八變；二依名釋之。

In the detailed explanation, it first explains what can transform, and then explains what can manifest. In the former regarding transformation, there is first a question, next the explanation, and finally a conclusion. In the explanation, first eighteen transformations are laid out, and second they are explained according to their names.