Before revision:  It automatically extracts useful meta-paths for each node from all possible meta-paths (within a length limit determined by the model depth ), which brings good model interpretability.
After revision:  It is designed as a hierarchical aggregation architecture, i.e., object-level aggregation first, followed by type-level aggregation. The novel architecture can automatically extract useful meta-paths for each node from all possible meta-paths (within a length limit determined by the model depth ), which brings good model interpretability.