Difference between revisions of "SFST"

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'''SFST''' (Stuttgart Finite State Toolkit) is a set of programs that can be used for writing morphological analysers.
'''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]].

==Downloading==

A packaged version, with the <code>fst-proc</code> program for processing Apertium input streams can be downloaded from Apertium SVN:


==Installation==
===Prerequisites===
On Ubuntu/Debian:
<pre>
<pre>
sudo apt-get install libreadline-dev
$ svn co http://apertium.svn.sourceforge.net/svnroot/branches/sfst
</pre>
</pre>


===Download, compile, install===
;Compiling:

Follow the standard steps:

<pre>
<pre>
wget ftp://ftp.ims.uni-stuttgart.de/pub/corpora/SFST/SFST-1.4.6g.tar.gz
$ sh autogen.sh
tar -xzvf SFST-1.4.6g.tar.gz
$ ./configure
cd SFST/src
$ make
$ make install
make
sudo make install
sudo make libinstall
</pre>
</pre>

Note: on Arch Linux, you may have to do <code>make clean && make CFLAGS=-fPIC</code> instead of make.


==Usage==
==Usage==
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</pre>
</pre>


Wait some time, and you will have a file called <code>morph.a</code>, now you need to compact this so it can be read by <code>fst-proc</code>,
Wait some time, and you will have a file called <code>smor.a</code>, now you need to compact this so it can be read by <code>fst-proc</code>,


<pre>
<pre>
$ fst-compact morph.a morph.ac
$ fst-compact smor.a smor.ac
</pre>
</pre>


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^Ich/<CAP>ich<+PPRO><pers><1><Sg><NoGend><Nom>$
^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>$[
^habe/haben<+V><1><Sg><Pres><Konj>/haben<+V><3><Sg><Pres><Konj>/haben<+V><Imp><Sg>/haben<+V><1><Sg><Pres><Ind>$[
<em>]^ein/ein<+ART><Indef><Masc><Nom><Sg>/ein<+ART><Indef><Neut><Nom><Sg>/ein<+ART><Indef><Neut><Akk><Sg>$[<\/em> ]^bier/*bier$.[][
<em>]^ein/ein<+ART><Indef><Masc><Nom><Sg>/ein<+ART><Indef><Neut><Nom><Sg>/ein<+ART><Indef><Neut><Akk><Sg>$[<\/em> ]^Bier/*Bier$.[][
</pre>
</pre>


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* [http://dev.sslmit.unibo.it/linguistics/morph-it.php Morph-IT!] (Italian, 34,968 lemmas, LGPL)
* [http://dev.sslmit.unibo.it/linguistics/morph-it.php Morph-IT!] (Italian, 34,968 lemmas, LGPL)
⚫
* [https://kitwiki.csc.fi/twiki/bin/view/KitWiki/OMorFiSFSTVersion Omorfi–SFST implementation of word form morphology of Finnish] (Finnish, 93,510 lemmas, LGPL)
**For further information see: [[Omorfi]]
* SMOR &mdash; comes in the SFST distribution (German, 1,096 lemmas, GPL)
* SMOR &mdash; comes in the SFST distribution (German, 1,096 lemmas, GPL)
* [[trmorph]] (Turkish, wide coverage)
⚫
* [https://kitwiki.csc.fi/twiki/bin/view/KitWiki/OMorFiSFSTVersion Omorfi–SFST implementation of word form morphology of Finnish] (Finnish, ?? lemmas, LGPL)
**For further information see: [[Turkish]]


==Performance==
==Performance==
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* [http://www.ims.uni-stuttgart.de/projekte/gramotron/SOFTWARE/SFST.html SFST - Stuttgart Finite State Transducer Tools]
* [http://www.ims.uni-stuttgart.de/projekte/gramotron/SOFTWARE/SFST.html SFST - Stuttgart Finite State Transducer Tools]


[[Category:Tools]]
[[Category:Morphological analysers]]

Latest revision as of 17:48, 30 March 2012

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[edit]

Prerequisites[edit]

On Ubuntu/Debian: 

sudo apt-get install libreadline-dev

Download, compile, install[edit]

 wget ftp://ftp.ims.uni-stuttgart.de/pub/corpora/SFST/SFST-1.4.6g.tar.gz
 tar -xzvf SFST-1.4.6g.tar.gz
 cd SFST/src
 make
 sudo make install
 sudo make libinstall

Note: on Arch Linux, you may have to do make clean && make CFLAGS=-fPIC instead of make.

Usage[edit]

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[edit]

SFST has the following morphologies available for download:

Performance[edit]

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.

External links[edit]

Retrieved from "https://wiki.apertium.org/w/index.php?title=SFST&oldid=33139"