3. The Backend API
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## 3. The Backend API

The header file that you need to use the interface are in the `include/yaz` directory. It's called `backend.h`. It will include other files from the `include/yaz` directory, so you'll probably want to use the -I option of your compiler to tell it where to find the files. When you run `make` in the top-level YAZ directory, everything you need to create your server is to link with the `lib/libyaz.la` library.

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