The legacy transform schemas:
add-1.0.0 add-1.1.0 affine-1.0.0 affine-1.2.0 airy-1.0.0 airy-1.1.0 bonne_equal_area-1.1.0 bonne_equal_area-1.2.0 cobe_quad_spherical_cube-1.0.0 cobe_quad_spherical_cube-1.1.0 compose-1.0.0 compose-1.1.0 concatenate-1.0.0 concatenate-1.1.0 conic_equal_area-1.0.0 conic_equal_area-1.1.0 conic_equal_area-1.2.0 conic_equidistant-1.0.0 conic_equidistant-1.1.0 conic_equidistant-1.2.0 conic_orthomorphic-1.0.0 conic_orthomorphic-1.1.0 conic_orthomorphic-1.2.0 conic_perspective-1.0.0 conic_perspective-1.1.0 conic_perspective-1.2.0 conic-1.0.0 conic-1.1.0 conic-1.2.0 constant-1.0.0 constant-1.1.0 constant-1.2.0 constant-1.3.0 cylindrical_equal_area-1.0.0 cylindrical_equal_area-1.1.0 cylindrical_equal_area-1.2.0 cylindrical_perspective-1.0.0 cylindrical_perspective-1.1.0 cylindrical_perspective-1.2.0 cylindrical-1.0.0 cylindrical-1.1.0 divide-1.0.0 divide-1.1.0 fix_inputs-1.1.0 gnomonic-1.0.0 gnomonic-1.1.0 hammer_aitoff-1.0.0 hammer_aitoff-1.1.0 healpix-1.0.0 healpix-1.1.0 identity-1.0.0 identity-1.1.0 label_mapper-1.0.0 label_mapper-1.1.0 mercator-1.0.0 mercator-1.1.0 molleweide-1.0.0 molleweide-1.1.0 multiply-1.0.0 multiply-1.1.0 parabolic-1.0.0 parabolic-1.1.0 plate_carree-1.0.0 plate_carree-1.1.0 polyconic-1.0.0 polyconic-1.1.0 polynomial-1.0.0 polynomial-1.1.0 power-1.0.0 power-1.1.0 pseudoconic-1.0.0 pseudoconic-1.1.0 pseudocylindrical-1.0.0 pseudocylindrical-1.1.0 quad_spherical_cube-1.0.0 quad_spherical_cube-1.1.0 quadcube-1.0.0 quadcube-1.1.0 regions_selector-1.0.0 regions_selector-1.1.0 remap_axes-1.0.0 remap_axes-1.1.0 remap_axes-1.2.0 rotate2d-1.0.0 rotate2d-1.1.0 rotate2d-1.2.0 rotate3d-1.0.0 rotate3d-1.1.0 rotate3d-1.2.0 sanson_flamsteed-1.0.0 sanson_flamsteed-1.1.0 scale-1.0.0 scale-1.1.0 shift-1.0.0 shift-1.1.0 slant_orthographic-1.0.0 slant_orthographic-1.1.0 slant_zenithal_perspective-1.0.0 slant_zenithal_perspective-1.1.0 stereographic-1.0.0 stereographic-1.1.0 subtract-1.0.0 subtract-1.1.0 tabular-1.0.0 tabular-1.1.0 tangential_spherical_cube-1.0.0 tangential_spherical_cube-1.1.0 transform-1.0.0 transform-1.1.0 zenithal_equal_area-1.0.0 zenithal_equal_area-1.1.0 zenithal_equidistant-1.0.0 zenithal_equidistant-1.1.0 zenithal_perspective-1.0.0 zenithal_perspective-1.1.0 zenithal_perspective-1.2.0 zenithal-1.0.0 zenithal-1.1.0