[itsdb] Problem with scores on my inflection rules

[Tore Bruland]

Hi.

I am using the NorSource grammar and I have installed the LOGON tree on my
64-bit machine with Ubuntu 12.04.
I have a problem with the scores on the inflection rules in the syntax trees
from NorSource. If I use the ERG grammar and the redwood.mem file, the parse
trees shows scores on the inflection rules. 
I have tried two test-suites. I have one small, only 13 sentences, and one
bigger 1129 sentences. The scores are always 0 on the inflection rules.

I train the model with the load script, dot.tsdbrc, and train.lisp from the
redwoods folder. The files are adjusted to my files.
I have created, parsed and annotated a small database in [tsdb++]. I run the
same sentences with ACE and Pet, but the scores on the inflection rules are
0.

One sentence is "gutten solgte bussen til mannen", and one tree (the
selected tree from the annotation) parsed with ACE:

(2692 head-subject-rule 6.716046 0 5 
 (197 sg_def_m_final-full_irule 0.844204 0 1 
  (157 sg-masc-def-noun-lxm-lrule 0.422102 0 1 
   (1 gutt_masc-reganim 0.000000 0 1 
    ("gutten" 453 "token ")))) 
 (2250 head-verb-comp-rule 5.560148 1 5 
  (192 pret-nonfstr_infl_rule 1.145396 1 2 
   (7 selge_tv 0.000000 1 2 
    ("solgte" 570 "token "))) 
  (2235 pp-mod-defbare-n-index-sit-rule 2.977362 2 5 
   (222 sg_def_m_final-full_irule 1.466776 2 3 
    (194 sg-masc-def-noun-lxm-lrule 0.902894 2 3 
     (8 buss_masc-dirnoun 0.000000 2 3 
      ("bussen" 687 "token ")))) 
   (1772 head-prep-comp-rule 0.740289 3 5 
    (24 til_poss 0.000000 3 4 
     ("til" 91 "token ")) 
    (223 sg_def_m_final-full_irule 0.266936 4 5 
     (196 sg-masc-def-noun-lxm-lrule 0.030260 4 5 
      (30 mann_masc-reganim 0.000000 4 5 
       ("mannen" 64 "token "))))))))

And parsed with Pet:

(1883 head-subject-rule 1.103 0 5 [root]
  (1874 sg_def_m_final-full_irule 9.041e-08 0 1
    (1873 sg-masc-def-noun-lxm-lrule 8.934e-08 0 1
      (6 gutt_masc-reganim/masc-reganim-noun-lxm 0 0 1
[sg_def_m_final-full_irule]
        (1 "gutten" 0 0 1 <0:1>))))
  (1882 head-verb-comp-rule 0.9468 1 5
    (1875 pret-nonfstr_infl_rule 0.2863 1 2
      (18 selge_tv/v-tr 0 1 2 [pret-nonfstr_infl_rule]
        (2 "solgte" 0 1 2 <1:2>)))
    (1881 pp-mod-defbare-n-index-sit-rule 0.1813 2 5
      (1877 sg_def_m_final-full_irule -5.485e-08 2 3
        (1876 sg-masc-def-noun-lxm-lrule -5.593e-08 2 3
          (31 buss_masc-dirnoun/masc-dir-noun-lxm 0 2 3
[sg_def_m_final-full_irule]
            (3 "bussen" 0 2 3 <2:3>))))
      (1880 head-prep-comp-rule 0.03026 3 5
        (36 til_poss/prep-word-poss 0 3 4 []
          (4 "til" 0 3 4 <3:4>))
        (1879 sg_def_m_final-full_irule 9.041e-08 4 5
          (1878 sg-masc-def-noun-lxm-lrule 8.934e-08 4 5
            (47 mann_masc-reganim/masc-reganim-noun-lxm 0 4 5
[sg_def_m_final-full_irule]
              (5 "mannen" 0 4 5 <4:5>))))))))

One of the lexicon entries for the preposition "til": 

til_poss := prep-word-poss &
  [ STEM < "til" >,
    SYNSEM.LOCAL.CAT.HEAD [KEYS.KEY til-poss ] ].

Suite_2.mem
(30) [1 (3) head-verb-comp-rule pp-mod-defbare-n-index-sit-rule
head-prep-comp-rule prep-word-poss "TIL"] 0.206416 {2 2 2 2} [0 1]
(31) [1 (2) pp-mod-defbare-n-index-sit-rule head-prep-comp-rule
prep-word-poss "TIL"] -0.0251066 {5 5 5 5} [0 1]
(32) [1 (1) head-prep-comp-rule prep-word-poss "TIL"] -0.0251066 {5 5 5 5}
[0 1]
(33) [1 (0) prep-word-poss "TIL"] -0.0251066 {5 5 5 5} [0 1]

I can’t see anything wrong here. "prep-word-poss" is relevant and it has a
score.
I need some help.
My trained model is attached in the e-mail.

Tore Bruland
PhD Candidate
Department of Computer and Information Science Norwegian University of
Science and Technology (NTNU) Sem Sælands vei 7-9
NO-7491 Trondheim, Norway
tel. +47 73 59 36 72
fax  +47 73 59 44 66
cel. +47 47 90 49 79

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