Charting the

Following Verde-Star, Linear Algebra Appl. 627 (2021), we label families of orthogonal polynomials in the $q$-Askey scheme together with their $q$-hypergeometric representations by three sequences $x_k, h_k, g_k$ Laurent $q^k$, two degree 1 and one 2, satisfying certain constraints. This gives rise to a precise classification parametrization these limit transitions. is displayed graphical scheme. We also describe four-manifold structure underlying