Below text should be changed to as "Input typing - Every input edge (Dx,Ny) requires Type(Ny, Name(Dx,Ny)) in {INPUT} or {INOUT}"
https://www.khronos.org/registry/OpenVX/specs/1.2.1/OpenVX_Specification_1_2_1.html#sec_data_virtual
2.8.6. Graph Formalisms
Output typing - Every output edge (Nx,Dy) requires Type(Nx, Name(Nx,Dy)) in {OUTPUT, INOUT}
Input typing - Every input edge (Nx,Dy) requires Type(Ny, Name(Dx,Ny)) in {INPUT} or {INOUT}