Difference between revisions of "SFST"
(→Packaged version with fst-proc: deprecated) |
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Note: on Arch Linux, you may have to do <code>make CFLAGS=-fpic</code> instead of make. |
Note: on Arch Linux, you may have to do <code>make CFLAGS=-fpic</code> instead of make. |
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| − | ==Packaged version with fst-proc== |
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| − | A packaged version, with the <code>fst-proc</code> program for processing Apertium input streams can be downloaded from Apertium SVN: |
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| − | : this is now superseded by [[HFST]] + hfst-proc, right? |
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| − | <pre> |
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| − | $ svn co http://apertium.svn.sourceforge.net/svnroot/apertium/branches/sfst |
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| − | </pre> |
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| − | ;Compiling: |
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| − | Follow the standard steps: |
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| − | <pre> |
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| − | $ sh autogen.sh |
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| − | $ ./configure |
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| − | $ make |
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| − | $ make install |
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| − | </pre> |
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| − | Mac users: first do |
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| − | <pre> |
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| − | $ sudo port install libtool |
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| − | $ sudo ln -s /opt/local/bin/glibtoolize /bin/libtoolize # or wherever |
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| − | </pre> |
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| − | (also, the call to <code>basename(name)</code> in src/fst-proc.C needs to be changed to eg. <code>name</code> if you want to compile without libiberty sources lying around) |
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==Usage== |
==Usage== |
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Revision as of 21:37, 29 March 2011
SFST (Stuttgart Finite State Toolkit) is a set of programs that can be used for writing morphological analysers. It is also one of the possible backends for HFST.
Installation
Prerequisites
On Ubuntu/Debian:
sudo apt-get install libreadline5-dev
Download, compile, install
wget ftp://ftp.ims.uni-stuttgart.de/pub/corpora/SFST/SFST-1.4.2.tar.gz tar -xzvf SFST-1.4.2.tar.gz cd SFST/src make sudo make install sudo make libinstall
Note: on Arch Linux, you may have to do make CFLAGS=-fpic instead of make.
Usage
To try SFST out, you can start by compiling the German transducer, SMOR, that comes with the package:
$ cd data/SMOR $ make
Wait some time, and you will have a file called smor.a, now you need to compact this so it can be read by fst-proc,
$ fst-compact smor.a smor.ac
Now you can use it,
$ cd ../../src $ echo "Ich habe ein Bier" | fst-proc ../data/SMOR/smor.ac ^Ich/<CAP>ich<+PPRO><pers><1><Sg><NoGend><Nom>$ ^habe/haben<+V><1><Sg><Pres><Konj>/haben<+V><3><Sg><Pres><Konj>/haben<+V><Imp><Sg>/haben<+V><1><Sg><Pres><Ind>$ ^ein/ein<+ART><Indef><Masc><Nom><Sg>/ein<+ART><Indef><Neut><Nom><Sg>/ein<+ART><Indef><Neut><Akk><Sg>$ ^Bier/*Bier$
It should also work with deformatters and reformatters,
$ echo "Ich habe <em>ein</em> bier" | apertium-deshtml | ./fst-proc ../data/SMOR/smor.ac ^Ich/<CAP>ich<+PPRO><pers><1><Sg><NoGend><Nom>$ ^habe/haben<+V><1><Sg><Pres><Konj>/haben<+V><3><Sg><Pres><Konj>/haben<+V><Imp><Sg>/haben<+V><1><Sg><Pres><Ind>$[ <em>]^ein/ein<+ART><Indef><Masc><Nom><Sg>/ein<+ART><Indef><Neut><Nom><Sg>/ein<+ART><Indef><Neut><Akk><Sg>$[<\/em> ]^Bier/*Bier$.[][
Note: fst-proc currently does a rather crude tokenisation based on spaces, so multiwords currently aren't possible.
Morphologies
SFST has the following morphologies available for download:
- Morph-IT! (Italian, 34,968 lemmas, LGPL)
- Omorfi–SFST implementation of word form morphology of Finnish (Finnish, 93,510 lemmas, LGPL)
- For further information see: Omorfi
- SMOR — comes in the SFST distribution (German, 1,096 lemmas, GPL)
- trmorph (Turkish, wide coverage)
- For further information see: Turkish
Performance
The analysers produced are fast. For a 1.3Mb analyser (SMOR), it processes ~1,100 words per second. Compare with lttoolbox which processes ~5,000 words per second.
