You can also read about the steps en sv-da here
http://www.dkuug.dk/wp-content/themes/dkuug/arkiv/DKUUG160.pdf
or see these videos here:
http://ftp.klid.dk/ftp/video/2010-06-10-apertium/
2013/2/11 Kevin Brubeck Unhammer <[email protected]>
> Per Tunedal <[email protected]>
> writes:
>
> > Hi,
> >
> > On Mon, Feb 11, 2013, at 9:17, Kevin Brubeck Unhammer wrote:
> >> Per Tunedal <[email protected]>
> >> writes:
> >>
> >> > Hi,
> >> > the Apertium for dummies-page is outdated. I would like the same
> >> > information, but updated.
> >>
> >> Hmm, if it's that confusing, maybe we should delete the wiki page. Each
> >> language pair is slightly different, so it's impossible to make an
> >> illustration that's true for all pairs.
> >
> > No, that's not the main problem. My problem is that I don't understand
> > what the commands stands for. I cannot recognize e.g. the tagger, the
> > lexical transfer etc.
> > I simply don't know what happens in each step shown by Apertium-Viewer.
>
> Every other line there shows the command that is run, and its arguments.
> /usr/bin/lt-proc is the morphological analysis (or generation, when it
> has a -g), /usr/bin/apertium-tagger is the tagger. Most commands you can
> search for on the wiki, or try typing into your terminal with --help:
>
> $ lt-proc --help
> lt-proc: process a stream with a letter transducer
> USAGE: lt-proc [ -a | -b | -c | -d | -e | -g | -n | -p | -s | -t | -v | -h
> -z -w ] fst_file [input_file [output_file]]
> Options:
> -a, --analysis: morphological analysis (default behavior)
> -b, --bilingual: lexical transfer
> -c, --case-sensitive: use the literal case of the incoming characters
> -d, --debugged-gen morph. generation with all the stuff
> -e, --decompose-nouns: Try to decompound unknown words
> -g, --generation: morphological generation
> -l, --tagged-gen: morphological generation keeping lexical forms
> -m, --tagged-nm-gen: same as -l but without unknown word marks
> -n, --non-marked-gen morph. generation without unknown word marks
> -o, --surf-bilingual: lexical transfer with surface forms
> -p, --post-generation: post-generation
> -s, --sao: SAO annotation system input processing
> -t, --transliteration: apply transliteration dictionary
> -v, --version: version
> -z, --null-flush: flush output on the null character
> -w, --dictionary-case: use dictionary case instead of surface case
> -h, --help: show this help
>
>
> >> > Apparently, Apertium-Viewer displays the steps
> >> > actually performed and in the actual order. I simply would like to
> have
> >> > them deciphered.
> >>
> >> Using
> >> http://wiki.apertium.org/w/images/2/25/Screenshot-jApertiumView.png as
> >> an example, the _first_ line
> >>
> >> "This is a sample text"
> >>
> >> is the input text to the command in the _second_ line,
> >>
> >> /usr/bin/lt-proc …/en-eo.automorf.bin
> >>
> >> and the _third_ line
> >>
> >> ^This/This<det>… ………
> >>
> >> is the output of that command. This output, is used as input to the next
> >> command (fourth line). You can run the same commands in your terminal;
> >> the same input should give the same output. Try it.
> >>
> >> > And further, I would like to know where and how a lexical selection
> >> > module would influence the translation.
> >>
> >> see illustration:
> >> http://article.gmane.org/gmane.comp.nlp.apertium/2715
> >
> > Francis writes:
> > "The lexical selection is done in the aptly-named "lexical selection"
> > stage, which sits between lexical transfer (which outputs all the
> > possible translations of each word) and structural transfer"
> >
> > But most alternative translations are already discarded by the tagger,
> > aren't they? In the very first step.
>
> No, that's alternative morphological analyses.
>
> Plain lt-proc (morphological analysis) gives one or more analyses:
>
> ^bank/bank<n><m><sg><ind>/bank<vblex><imp>$
>
> apertium-tagger chooses one _analysis_:
>
> ^bank/bank<vblex><imp>$
>
> lt-proc -b (lexical transfer) adds one or more translations (and retains
> the original one):
>
> ^bank<vblex><imp>/beat<vblex><imp>/knock<vblex><imp>$
>
> lrx-proc (lexical selection) chooses one _translation_ from these:
>
> ^bank<vblex><imp>/knock<vblex><imp>$
>
> and then apertium-transfer moves words around or whatever.
>
>
> Of course, if bank<n> were chosen by the tagger, that would also lead to
> a different translation, but it's a choice of a different sort (is it a
> noun or is it a verb, rather than what translation does that particular
> verb have).
>
> --
> Kevin Brubeck Unhammer
>
> GPG: 0x766AC60C
>
>
>
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