This package contains scripts and Prolog programs to parse sequences in 
grammars obtained during an inference process on the "middle" sequences.

Files are:
- all_middles.pl : the middle sequences to parse
- split_middle.py : a script to split the all_middle.py sequences into 
                    sequences of similar lengths
- run_parsing_yap.py : script to run the parsing with yap on the different 
                       sequences and grammars
- run_parsing_dftd.py: script to run the parsing with our DFTD parser on the 
                       different sequences and grammars
- parse_yap.pl : Prolog code for the parsing
- parse_dftd.pl :  Prolog code for the parsing using the DFTD parser

To reproduce the experiments obtained in the paper, you will need to follow 
these steps:

1) Ensure you have got the rules to parse. Thes files are called
   res_clauses.pl and res_rules.txt. (Obtain it from package 
   set_construction.tar.gz to download at 
   http://www.comp.rgu.ac.uk/staff/chb/research/data_sets/ilp05/#Software) 
   or ask them directly to the authors.)
   
2) Split these rules with respect to their lengths by running command  
       split_on_clause_length.py
   You should obtain a set of files with names 
       res_clauses1.pl to res_clauses7.pl
       res_rules1.txt to res_rules7.txt

3) Obtain the sequences to parse. To do so, run script 
       split_middle.py
   You should obtain a set of files with names 
       middle0_9.pl to middle90_99.pl 

4) To run parsing with Yap, edit script run_parsing_yap.py and change the 
   value of variables gram_dir and seq_dir to reflect respectively the place 
   where you stored files res_* of point 2, and files middle* of point 3.
   Then execute command:
       run_parsing_yap.py

4')To run parsing with the DFTD parser:
    4'.1) You need to ensure you have installed the DFTD parser (package 
    dftdp_in_yap.tar.gz to download at 
    http://www.comp.rgu.ac.uk/staff/chb/research/data_sets/ilp05/)
    4'.2) You need to update paths:
      - Edit script run_parsing_yap.py and change the value of gram_dir and 
        seq_dir to reflect respectively the place where you stored files 
        res_* of point 2, and files middle* of point 3.
      - Edit Prolog file parse_dftd.pl and change, in predicate 
        init_dftdp_structures, the path of the files of the DFTD parser to 
        reflect where you placed the DFTD parser package (4'.1)
    4'.3) Then execute command:
       run_parsing_dftd.py