Per Tunedal <per.tune...@operamail.com> writes: > Hi again, > how does Apertium actually work? > > What does the tagger actually do? It analyses the input word and decides > which one to bet on? That one word is forwarded to XX and translated. > If several possible translations are found, all of them are forwarded to > the following steps? > > And one of those is chosen by the YY if not your lexical selection > module is used?
There are two types of disambiguation that may happen: morphological, and lexical-selection. All pairs do morphological disambiguation, this is what apertium-tagger does. This is ambiguity like 'kon' being "ko" vs "kon", or 'ta' being inf vs imp. It runs on the output of monodix. Most pairs don't do lexical-selection disambiguation. This happens after morphological disambiguation, and after the second run of lt-proc, the bidix output. This regards choices like should 'ta' be translated into English using "take" or "grab" or "get" or … E.g. if you had se-en, maybe lt-proc with monodix (analysis) gives: ^ta/ta<vblex><imp>/ta<vblex><inf><actv>$ apertium-tagger (morphological disambiguation) gives: ^ta<vblex><imp>$ lt-proc with bidix gives: ^ta<vblex><imp>/take<vblex><imp>/get<vblex><imp>/grab<vblex><imp>$ lrx-proc (lexical selection) gives: ^grab<vblex><imp>$ and that is passed on to transfer rules (which ensure you write "grab the cone" and not just "grab cone", but they are not responsible for choosing word-translations from bidix). -- Kevin Brubeck Unhammer GPG: 0x766AC60C
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