would that be HiMiE?
You got the general idea, but it was on purpose that I wrote Himie. Gives it a kind of human touch. I’m not that fond of fancy technical word abbreviations.
If you don’t want to go the route of an abbreviation, how about using the word “nested”?
As suges indicated earlier in this topic, the word ‘nested’ does not appeal to everyone. But I got no problems if people would like to refer to tracks as being ‘nested’.