Ideas for Google Summer of Code/Closer integration with HFST

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This is a set of subtasks to make it easier for Apertium developers to use the Helsinki Finite-State Toolkit (HFST). HFST is a great toolkit for working with morphological transducers, but it is pretty difficult to install, and also not very well integrated with Apertium / doesn't really follow the Apertium way of doing things. We'd like to make it more closely integrated.


  • Create a new XML-based format for lexc inspired by lttoolbox (see Development ideas for dictionary format)
  • Add a compiler for this format, with support for direction restrictions.
  • Fix this bug in hfst-proc tokenisation.
  • Modify the HFST build process to make a "minimal" Apertium-centred install.
  • Add lttoolbox as a backend to HFST.
  • Make hfst-expand obey flag diacritics.

Coding challenge[edit]

  • Install Apertium and HFST
  • Install a language pair which uses both Apertium and HFST.

Frequently asked questions[edit]

  • none yet, ask us something! :)

See also[edit]