Hi, Mikel, Jimmy,
Thanks for your responses!
I have done a C++ version, with some care for option errors. Here is the
code:
https://github.com/elephantgcc/gsoc-2013/blob/master/ApertiumFilter.cpp
Your explanations are very helpful for me to update my understanding.
As to the restrictions, as far as I know from the documentation, in the
current HMM tagger, it is done by modifying the transition matrix during
training, so that the FORBID transitions have a probability of 0. However,
In the case of sliding-window PoS tagger, I think I need some time to go
into the details of the tagger.
Best wishes,
Gang Chen
2013/4/21 Mikel Forcada <[email protected]>
> Hi Gang,
> your code seems to work correctly, at least in a few tests I have
> performed. There is only one thing that I didn't like: the program
> silently exits unless there is one of the options -r/-f. It should give an
> error.
>
> As Jimmy O'Regan says in his message, and even if it is not a requirement,
> we do need to see if you could prepare a C++ version of the coding
> challenge, as this is the language that is going to be used for the
> sliding-window part-of-speech tagger. Can you do that Gang?
>
> As to the intuitive idea, well, the sliding-window PoS tagger is different
> from an HMM PoS tagger, but I would not say that it can use "more
> information". In fact, if both the previous and the following word are
> ambiguous, an HMM PoS tagger is actually using a wider context, as it will
> not make a decision until a nonambiguous word appears.
>
> It is just a different way of tagging. We suspect it uses more parameters,
> but it can easily be turned into a finite-state transducer after training.
>
> We are also interested in the way you can introduce restrictions (FORBID)
> in the tagger.
>
> I look forward to hearing from you.
>
> Best
>
> Mikel
>
> --
> Mikel L. Forcada (http://www.dlsi.ua.es/~mlf/)
> Departament de Llenguatges i Sistemes Informàtics
> Universitat d'Alacant
> E-03071 Alacant, Spain
> Phone: +34 96 590 9776
> Fax: +34 96 590 9326
>
>
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