Would be possible to include other categories of type systems beyond grids as variables? Kimberly Elam proposed a taxonomy of GRID types for graphic design that was quite elastic. Not all webdesign need to follow the same GRID properties. In the taxonomy was documented:
dilatational
bilateral
radial
modular
ramdom
grid
transitional axial
Web design could follow: https://www.amazon.co.uk/Typographic-Systems-Kimberly-Elam/dp/1568986874