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Intro

LTToolbox context

  • One can write finite state transducers for natural language processing (translation, declension, analysis) using lt-toolbox technologies.
  • One creates dix files defining these tranducers, compiles them to bin files and then uses them for the final ends.
  • Lt-toolbox libraries and tools are available in C++ and java.

Goals

  • Write scala/ java wrappers for invoking FST-s in lt-toolbox bin files.

SCL tools

Intro

  • Smt Ambaa KulkarNi has led the creation of several such FST based tools. These are very useful for word generation and analysis.
  • They're hosted on <scl.samsaadhanii.in> and mirrors.

Resources available as of July 2017:

  • Only the lttoolbox compatible bin files are provided without any documentation (by request, not on any public site).
  • This is usually a part of the scl website code, which is antiquated and mostly useless for further development (while still serving as a useful reference for how the core lttoolbox bin files are to be invoked) as it:
    • relies on CGI technology.
    • is written in perl.
    • has a poor build system.
  • These lttoolbox compatible bin files don't work with the Java libraries as of July 2017 - see thread.
  • Smt Ambaa does not provide the dix files (including to this author).
  • So there is an outsider cannot consider using them :
    • to grok how the bin files are to be invoked
    • to understand the underlying lttoolbox technology by example.
    • to develop the FST-s further.

Invocation tips

The below are sourced mostly from communication with smt ambaa and from experiments.

General tips

  • "To know the input for tin / krt / taddhita generator, you give a tinanta / krdanta / taddhitaanta to the all_morf.bin, and it will produce the analysis. That analysis is the input for the generator."

subanta generator

  • Regarding the level parameter:
    • level 1 is used for the avyutpanna praatipadikas and dhaatus (corresponds to inflectional morphology, with sup and tin)
    • level 0 is for the vyutpanna praatipadikas.
    • level 2: vyutpanna krdanta subanta (a noun form derived by adding a krt suffix)
    • level 3: vyutpanna taddhita subantas
    • level 4: vyutpanna uttarapadas of a compound

tinanta generator

Regarding the level parameter:

  • In the case of verb forms, I have only level 1. The Nijantas, though derived are assigned the same level.