Transformation algorithm proposal, FST2 to JSON

[ppKrauss]

"An .fst2 file is a text file that describes a set of graphs", Unitex-GramLab-3.1-usermanual-en, chapter 14.3.2, "Format .fst2".

Proposal

To transform (export) the .fst2 file into .fst2.json, with some enhancing semantic and a formal description with json-schema. Example:

{
  "graphs":{
     "NP":["1 1", "2 2", "-2 2", "3 3", "t", "f"],
     "Adj":["6 1","5 1","4 1","t","f"]
  }, 
  "etc":["%<E>","%the/DET","%<A>/ADJ","%<N>","%nice","@pretty","%small","f"]
}

obtained from (original example of the chapter 14.3.2),

0000000002
-1 NP
: 1 1 
: 2 2 -2 2 
: 3 3 
t 
f 
-2 Adj
: 6 1 5 1 4 1 
t 
f 
%<E>
%the/DET
%<A>/ADJ
%<N>
%nice
@pretty
%small
f

The formal specification of the translation-algorithm (that can be translated to C++ for best implementation) can use Javascript, Perl or another simple language... Anyway there are some tips, or it can be inspired, by ElagFstFilesIO.cpp, ElagFstFilesIO.cpp, etc.

[martinec]

It could be nice to have a tool to perform two-way translations of the .fst2 files to json. However, I doubt many users would be interested in this. In any way, If you want to contribute this feature, feel free to open a PR on the core repository. In the meantime, I'm closing the issue.