tagger.h

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00001 
00002 //
00003 //    FreeLing - Open Source Language Analyzers
00004 //
00005 //    Copyright (C) 2004   TALP Research Center
00006 //                         Universitat Politecnica de Catalunya
00007 //
00008 //    This library is free software; you can redistribute it and/or
00009 //    modify it under the terms of the GNU General Public
00010 //    License as published by the Free Software Foundation; either
00011 //    version 2.1 of the License, or (at your option) any later version.
00012 //
00013 //    This library is distributed in the hope that it will be useful,
00014 //    but WITHOUT ANY WARRANTY; without even the implied warranty of
00015 //    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016 //    General Public License for more details.
00017 //
00018 //    You should have received a copy of the GNU General Public
00019 //    License along with this library; if not, write to the Free Software
00020 //    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
00021 //
00022 //    contact: Lluis Padro (padro@lsi.upc.es)
00023 //             TALP Research Center
00024 //             despatx C6.212 - Campus Nord UPC
00025 //             08034 Barcelona.  SPAIN
00026 //
00028 
00029 #ifndef _POS_TAGGER
00030 #define _POS_TAGGER
00031 
00032 #include <list> 
00033 #include "fries/language.h"
00034 
00035 #define FORCE_NONE   0  // no selection forced
00036 #define FORCE_TAGGER 1  // force select after tagger
00037 #define FORCE_RETOK  2  // force select after retokenization
00038 
00044 
00045 class POS_tagger {
00046 
00047    protected: 
00048       // remember whether retokenization is active
00049       bool retok;
00050       // remember whether the user asked to force only one tag per word
00051       unsigned int force;
00052       // retokenize words that may need it after tagging
00053       void retokenize(std::list<sentence> &);
00054       // force the selection of only one Pos tag per word
00055       void force_select(std::list<sentence> &);
00056 
00057    public:
00058       POS_tagger(bool,unsigned int);
00059       virtual ~POS_tagger() {};
00060       virtual void analyze(std::list<sentence> &)=0;
00061 };
00062 
00063 
00064 #endif
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