User blog comment:Alemagno12/How to SAN/@comment-5029411-20170804113940/@comment-5029411-20170804225653

Here is my idea for sDDN.

Imagine A is 1st mark of the A definition, and adding grave accent in the right changes to the next mark of the A definition.

Then we could define n-droppers of the A definition, which drops down n times, to the A definition.

The 1-dropper-1-dropper separator is the plus sign. Then we could have 2-dropper-1-dropper (1-dropper-1-dropper of 1-dropper-1-droppers), nested dropper-1-dropper, dropper-(nth mark of 1-dropper) (like dropper-(n-1th mark of 1-dropper), but having plus signs instead of commas).

We could get 1-dropper-2-droppers by dropping down to terms of 1-dropper-(nth mark of 1-droppers). I call its' shorthand as the star symbol.