Hello,
My contribution to Apertium is a bit far away now, but from what I can
remember, I did the rules for the en-ca pair with the idea that Fran
exposed in his email. It was a three level transfer, and in general:
-t1x for intra-phrase operations and chunk building: agreement in noun
phrases (like adj-noun, coordinated nouns); in verb groups (aux-verb), also
including treatment of enclitics and verbs, as it affects contiguous words
and, due to the LRLM principle, liberates the verbs for other long-distance
treatments in t2x (e.g.: take it out); and some local changes for pronouns.
-t2x for inter-phrase operations: long distance agreements (subj-verb),
taking into account patterns with prepositional phrases (like SN + SP +
Verb); relative clauses and other subordinate clauses
-t3x: insertion or correction of particular words depending on the output
of t2x (e.g. insertion of articles, change of an article from definite to
indefinite (for basque), make a pronoun a reflexive pronoun
For Basque-Spanish I had the same principles, although there may be some
particular differences due to the distance of the languages involved; if
you need it, I could look more carefully at the code. In:
http://wiki.apertium.org/wiki/Basque_and_Spanish/informe_2008
in the chapter "Transferencia" there is a general description of the types
of transfer rules for basque.
Regards,
Mireia
On Thu, Nov 14, 2013 at 5:02 PM, Hèctor Alòs i Font <[email protected]>wrote:
> Mikel, Aida:
>
> It's not a discussion about what is used in t1x and t2x, but in
> http://wiki.apertium.org/wiki/French_and_Esperanto/Notoj_pri_versioj#.C5.9Ctupoj(referencing
> to the problems explained in
> http://wiki.apertium.org/wiki/Kelkaj_notoj_pri_la_svarmo_de_reguloj )
> there is a discussion about what is done in the n-stage transfer used in
> the French-to-Esperanto translator. In fact, the discussed problem is not
> the limit between t1x and t2x, but what is done the different t(2.n)x
> levels. I'm not sure it may help, but in any case...
>
> Hèctor
>
>
> 2013/11/13 Mikel L. Forcada <[email protected]>
>
>> Dear all,
>>
>> Aida Sundetova, a 4th-year student from the Kazakh National University
>> in Almaty is visiting the Universitat d'Alacant and we are working
>> together on apertium-eng-kaz (and we plan to do some kaz-eng). We
>> believe this language pair has a strategic value as much of what we do
>> will be reused for other X-Turkic language pairs. In view of that
>> responsibility, we are compelled to do things right.
>>
>> As you know, our three-level structural transfer is not computationally
>> more powerful than the original one-level transfer, but it makes it
>> possible to "factor out" some common .t1x operations into higher-level
>> .t2x rules.
>>
>> Aida and I are currently arriving to a point where we have to make
>> decisions as to what to put in .t1x and what to put in .t2x. Many of our
>> language pairs have three-level structural transfer, and therefore,
>> their developers have faced the same problems as Aida and I have, but I
>> am not aware of any place where these decisions are explained.
>>
>> So, before searching in existing language pairs and trying to understand
>> other people's code (which is more or less like using archaeology to
>> figure out what an ancient culture was), we would appreciate it very
>> much for developers to come forward and give us some clues about how
>> they did their job. Any informal narrative would be helpful. I know
>> that this may involve some soul-searching (a.k.a. elicitation), so I
>> appreciate your effort even more!
>>
>> We plan to write this up as part of Aida's degree defense, and we will
>> duly acknowledge any input there!
>>
>> Thanks a lot
>>
>> All the best
>>
>> Mikel L. Forcada
>>
>> --
>> 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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