Information technology —
Computer graphics and image processing —
Spatial Reference Model (SRM) language bindings —
Part 4: C
The Spatial Reference Model (SRM), ISO/IEC 18026, specifies a language independent application program interface (API). For integration into a programming language, the SRM API is embedded in a language dependent layer obeying the particular conventions of that language. This part of ISO/IEC 18042 specifies such a language dependent layer for the C language.
http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_IEC_18042-4_Ed1.html