how to figure out the ioe file in AL

hi,
I have some confusion about the AL or AF splicing type，the data like this

<img width="2616" height="416" alt="Image" src="https://github.com/user-attachments/assets/ba022c63-65fd-4695-ae43-524b6f1d5ec5" />
I want to know any clear links in this three columns event_id ,alternative_transcripts, total_transcripts
this is complex for a little bit compared to A3 or A5.