# APX IDL

APX IDL is an Interface Definition Language (IDL) created and maintained by [Conny Gustafsson](https://github.com/cogu/).

Previously this language was known as *APX Text* but has since been renamed to APX IDL.

```{toctree}
:maxdepth: 1
:hidden:

apx_idl_12
apx_idl_13
```

## Versions

- [APX IDL v1.2](apx_idl_12.md) (Stable)
- [APX IDL v1.3](apx_idl_13.md) (Draft)

## History

### APX v1.0

- Developed in early 2014 with a toolchain implemented in Node.js.
- Specification was never released in electronic form.

### APX v1.1

- Research project in 2015 with a toolchain implemented in Qt5.
- Experimental only and was eventually replaced by APX IDL v1.2.
- Specification was never released in electronic form.

### APX v1.2

- Developed in 2016-2017 with a toolchain implemented in Python 3.
- Stable version used by all implementations.
- Backwards compatible with APX IDL v1.0.

### APX v1.3

- In active development.
- Full implementations in C and Python 3.
- Backwards compatible with APX IDL v1.2 (with redefined 64-bit integers and explicit char encodings).