# FST File Format 

:::{important}
Under construction.
:::

The only "official" documentation of the FST format (for now)
is [this](https://github.com/gtkwave/gtkwave/blob/master/lib/libfst/block_format.txt)
text file and the [libfst source code](https://github.com/gtkwave/gtkwave/blob/master/lib/libfst).

An unofficial documentation is available on [here](https://blog.timhutt.co.uk/fst_spec/)