Hi!
Thank you for the quick answer! I am right, then, that string->tree is
equivalent to simultaneous parsing and translation?
Best,
Thomas
________________________________
Von: Lane Schwartz <[email protected]>
An: Thomas Schoenemann <[email protected]>
CC: "[email protected]" <[email protected]>
Gesendet: 20:17 Freitag, 30.März 2012
Betreff: Re: [Moses-support] Newbie question: what category is Hiero?
On Fri, Mar 30, 2012 at 2:08 PM, Thomas Schoenemann
<[email protected]> wrote:
Hi everyone,
>
>
> there is quite a discussion about hierarchical and syntax-based approaches
>here at the moment. For lack of time I could not follow it closely, so I hope
>this question contributes to the discussion rather than being superfluous: in
>terms of {tree/string} -> {tree/string}, how would you classify Hiero? My
>understanding of tree -> {string/tree} is that you have a source tree given,
>which is not the case for Hiero. And string->string does in my understanding
>not involve CFG-like rules at all. So Hiero would be string->tree. But this
>solution is entirely based on eliminating the alternatives. I'd prefer to
>have an expert come up with a constructive explanation.
>
>
>Thanks much!
> Thomas (currently University of Düsseldorf)
>
>
>
>P.S: MERT now has an optional positivity constraint.
>
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>
>
Also, if you're reading the literature on different types of
syntactically-informed translation models, be aware that many of the
(mostly older) papers use noisy channel terminology.
In those older papers, the authors switch the direction of the
model, and so for what you might think of as a string->tree system,
the authors of such papers say they have a tree->string system. In
other words, they write output->input instead of input->output.
Lane_______________________________________________
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