In Cocos Shader, you typically don't need to write these Attributes as they are handled automatically in chunks.

For example, 2D materials automatically execute this chunk: https://github.com/cocos/cocos-engine/blob/v3.8.6/editor/assets/chunks/legacy/main-functions/general-vs.chunk

Regarding chunks: http://localhost:5173/creator/3.8/manual/en/shader/effect-chunk-index.html

The Cocos Shader documentation usually doesn't teach users how to write raw Shader programs. Instead, we want users to learn how to use Cocos Shader and add the content they need.