The Asset-Importer-Library can be used in your applications in two ways:
Using it by installing pre-built libraries
Integrate the library into your project via cmake.
Both ways are described at Build instructions
When you’re done integrating the library into your IDE/project, you can now start using it. There are two separate interfaces by which you can access the library:
A C++ interface
A C interface using flat functions.
The C++-API supports an RTTI-based approach. If you want to work with C++ using these interfaces is strongly recommended. The C-API shall help to generate any language binding more easily.