One thing that may help is to drop the typing for generic words or pidgin holes, that will help with the FORTRAN example.

The IBM 704 had 3 index registers, which could be combined together with a bitwise OR, then was subtracted from a base address, that's where FORTRAN for its 7D arrays from.

When you mix that concept of decrementing index registers with hypercubes, you will naturally get to the extract format of BI tools like classic Tableau.