- My View
This is a pretty legacy view of Knowledge. I can tell you that it loops through the topics, the topics are an old field that used to be exposed at the knowledge article level and are now hidden.
What are you trying to do with the kb_home page? Do you need to know the exact Jelly that loops through them?
I believe the topic and category values are stored in the sys_choice table.
Here's a link to view your topic values:
Is this what you're looking for?