?? schubert interpretation of conformal structure (cone field ...) on g2 quincunx grassmanian coming from ... ??being projective light cone ... ??? ...

???hmmm, so this is a pretty general question actually?? ... lots of cases of (generalized) grassmanians nicely interpretable as "projective light cones", which systematically get those conformal structures, so can ask about schubert interpretation of those cone-fields ...