Eckhard Bick - VISL

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syntactic reach of ordinary hand-crafted CG rules, and that linguist written rules have not (yet) been extensively employed. - 150 -
3.6 The rule formalism In principle, the paradigm of Constraint Grammar is independent not only of the particular notational conventions commonly associated with it (such as flat dependency syntax), but also of the rule formalism used to implement and compile Constraint Grammar rules. Up to now, however, only very few CG-compilers have been written, and the conventions established by Fred Karlsson’s original LISP-implementation have largely been maintained in later implementations. Today, to my knowledge, only Pasi Tapanainen’s two rule compilers, cg1 and cg2, are available to the research community, one licensed by Lingsoft (www.lingsoft.fi), the other by Connexor (www.conexor.fi). For testing purposes I programmed (in 1996) a C-version of a cg1-compatible compiler myself, which handled the morphological disambiguation module in my parser, but only at about 50% the speed achieved by Tapanainen’s cg1. Still, I gained valuable insight into the way CG-rules work and interact on a technical level. Thus, I was able to measure “reiteracy” on individual rule set levels: Though - in theory - rules are supposed to come into play gradually as their contexts grow safer by the work of other rules, in practice almost all test runs “dried up” already after 2 rounds (on the same heuristics level). In the face of 18% four-fold-or-higher morphological ambiguity (ch. 3.2.1), this may mean that CG-rules help each other somewhat more by focusing on different tags and contexts than by disambiguating each other’s context. In other words, CG-rules can be thought to be complementary to a higher degree than they are interdependent. This chapter is meant as a short but comprehensive introduction to Pasi Tapanainen's cg2 rule-compiler (Tapanainen, 1996), which is the one PALAVRAS is currently using (1999). The cg2-compiler runs under UNIX, with the following command line: dis —grammar rule-file < text.tagged > text.dis (which reads a rule file into the compiler, and applies it to a tagged text, a disambiguated version of which is then written to an output file.) Or (if mapping rules are included, typically at the syntactic level): mdis—grammar rule-file < text.tagged > text.map&dis Input from the morphological analyser must be verticalised text, i.e. one word form per line, followed by all possible readings for this word form, with one reading pr. line, typically arranged as a so-called cohort in the following way, conventionally with base forms in quotes, secondary tags in , and morphological tags (the ones destined for disambiguation) in capital letters. word form “base form-1” .. .. WORD CLASS-1 INFLEXION - 151 -
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Eckhard Bick ♠ THE PARSING SYSTEM
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Abstract The dissertation describes
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3.7.2. Making the most of the lexic
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Inflexion tags 451 Syntactic tags 4
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first, - but soon, it would move th
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disambiguated), same level tags (to
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chain, but rather the linguistic co
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2 The lexicomorphological level: St
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The core of PALMORF is written in C
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(d) as part of words. For instance,
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(1) binary search technique: a . .
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acapitã#=#####B(orn)###413 acara#a
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Words with graphical accents often
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2.2.3.2 The inflexional endings lex
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2.2.3.3 The suffix lexicon (1) 1
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Suffix combination rules is also us
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an V a DERP a- [ANT] brad Vi as HV
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"inimigo" ADJ M P "inimigo" N M P
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variable word forms receive '_'- li
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The remaining 2 words of the 4-word
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appear truncated or not, depending
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comparison to the substring consist
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My present linguistic solution 28 i
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In some non-personal proper nouns,
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(i.e., not too complex) derivationa
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2.2.4.5 Abbreviations and sentence
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Another case, where meaning bearing
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2.2.4.6 The human factor: variation
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circumflex-) accented words without
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the tagger tries to identify a word
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xxxar-#1##AaiD######54578 endings-s
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"sombrancelha" N F P '=sobrancelha
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(6) Word class distribution and par
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VFIN 24.96 16 7.77 9 2.46 - - 25 3.
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the present participle by derivatio
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Inflexion tags combine with word cl
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2.2.5.2 The individual word classes
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SPEC "specifiers": independent pron
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WORD FORM and LEXEME CATEGORIES gen
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WORD FORM and LEXEME CATEGORIES dea
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mood VFIN finite IND indicative SUB
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prefixal derivation in verbs comple
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graph. def. characteristics: hyphen
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PP prepositional group de=aluguel
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2.2.5.3 Portuguese particles By ‘
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Deictic adverbs refer to discourse
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algo, algum=tanto, nada, nadinha?,
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quando når, da hvornår quanto [QU
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(1) Language distribution and error
Page 99 and 100: 3 Morphosyntactic disambiguation: T
Page 101 and 102: (4) "quando" conjunction or adverb
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Page 107 and 108: The fact that these semantic distin
Page 109: In (Karlsson et. al, 1995:19ff) an
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Page 114 and 115: • 5. Tags can be integrated as me
Page 116 and 117: 19 0 0 - - - - >= 20 15 1 - - - - t
Page 118 and 119: Portuguese non-name words. Apart fr
Page 120 and 121: words: 40.8 10.5 17.9 2.9 0.5 3.1 8
Page 122 and 123: quite distinct, and few irregular e
Page 124 and 125: 3.3 Borderline ambiguity: The limit
Page 126 and 127: (5b) They [saw(see) [the girl with
Page 128 and 129: Choose 'saw', if within the same cl
Page 130 and 131: ambiguous words), moving them to "l
Page 132 and 133: (3) modernização "modernizar" N
Page 134 and 135: 3.5.1 Probabilistics: The 'fire a l
Page 136 and 137: In a brute force approach, for an a
Page 138 and 139: While undeniably involving more con
Page 140 and 141: Generative Grammar, introduced and
Page 142 and 143: node without branches matching the
Page 144 and 145: example is a grammar of one termina
Page 146 and 147: wide coverage tagging and parsing t
Page 148 and 149: ambiguity, Constraint Grammar can a
Page 152 and 153: “base form-1” .. .. WORD CLAS
Page 154 and 155: Base forms ("...") are tags like al
Page 156 and 157: play after base form rules targetin
Page 158 and 159: The above sequences are examples of
Page 160 and 161: 3.7.2 Making the most of the lexico
Page 162 and 163: (1) number of CG rules containing a
Page 164 and 165: Intuitively, one might assume (a) t
Page 166 and 167: constructions. Something similar is
Page 168 and 169: are shaded, as well as the sum-colu
Page 170 and 171: For global context syntactic rules
Page 172 and 173: In table (4), three types of contex
Page 174 and 175: ules appear to be slightly more com
Page 176 and 177: (5a), continued ¡ ¢ number of con
Page 178 and 179: in the sequential “understanding
Page 180 and 181: all - 356 978 492 2219 C-percent 39
Page 182 and 183: 3.8 Mapping: From word class to syn
Page 184 and 185: @ADVL [N-temp ADV PRP #ICL #FS #AS]
Page 186 and 187: @#AS-A< [ADV-rel] @#AS- @#AS-
Page 188 and 189: During the project period I have do
Page 190 and 191: syntactic errors around it, by prov
Page 192 and 193: 1. Orthography and layout normalisa
Page 194 and 195: Of course, the use of dishesion mar
Page 196 and 197: S2 para aquele ... está perfeitame
Page 198 and 199: Parser performance on speech data (
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4 The syntactic level: A dependency
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subjects, but the second subject ca
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(7) SUBJ o [o] DET M S @>N 'the' b
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4.1.2 Dependency relation types: Cl
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(1) Table: Constituent structure ty
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Any further, more detailed, syntact
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discussion are inspired by Perini (
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Thus, we get ”Comeu peixe/bananas
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type-4 adverbials. Second, adverbia
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they all share one, and only one, c
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AB todos estes ambos os uns, uma,
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from personal pronouns, are not mut
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noun. Only very few adjectives (the
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4.2.2 The adpositional group head a
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However, adnominals can point to a
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(g) isso existe (até/nem (nos Esta
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4.3 The verb chain 4.3.1 The predic
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* aspect estar/andar/continuar/segu
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Ordinarily, 'o' is understood as su
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second verb's object 152 ), with so
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different subjects of matrix and su
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case function ± fronting ÷ fronti
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Quando ”quando” ADV @#FS-ADVL
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abalançar a kaste sig ud i at acab
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fazer xt, xd xdr få til at, lade s
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4.4 Clause types and clause functio
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@#ICL- non-finite subclause (combin
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While it is one of the clausality t
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(6) ..., tudo @S< pago @NN mão @
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(1g) Não [queria [comer outro bolo
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Apart from the presence of predicat
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demais [demais] DET M/F S/P @>N ‘
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element is a comparator and the sec
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without a predicator's valency info
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quantifying) cases, indicating adve
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4.5 Under the magnifying glass: Spe
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O assunto eram as ditaduras 2. F E
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The examples show that the normal "
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focusing function to the syntactic
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the quantifying adverbs mais and me
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qual DET @SC> @#FS-KOMP< antes era
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o [o] DET M S @AS< ‘that’ de [d
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[P=predicator, O=object, A=adverbia
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mais=de [mais=de] ADV @>A ‘more
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(2k) Ficou [ficar] V PS 3S IND V
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interno [interno] ADJ M S @N< '-'
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a preposition, por, then allowing f
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4.5.3 Tagging the quantifier 'todo'
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connection with personal pronouns -
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4.5.4 Adverbial function 4.5.4.1 Ar
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explanation for this may be that a
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a [a] DET F S @>N ‘the’ pergun
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carro [carro] N M S @SUBJ> ‘car
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pass the second test ('*De seu novo
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Therefore, the @ADV-@ADVL distincti
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@PIV, @ADV and @SC are - unlike @AD
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heads a "material" PP. The followin
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4.5.4.3 Intensifier adverbs Intensi
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4.5.4.4 Complementiser adverbs: Int
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complementiser in nominal FS or ICL
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hooked AS-relatives (3) they even a
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4.5.4.5 Adverb disambiguation and o
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position: adverb class: A) set oper
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(5b) fits fairly well into the (A)
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antes/depois+de Depois [depois] AD
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While (2c-e) can be described as pr
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In (4d) ter ('have') does have mono
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When the potential subject is post-
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(1) Table: functions of pronominal
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ditador [ditador] N M S @N ‘-’
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In other contexts, para is not usua
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life that the work of different gra
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SPEC DET/SPEC ¬ @#FS/AS-N< artic
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4.6.3 Tree structures for constitue
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dono de restaurante que pilota a pr
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|-@N
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4.7 Elegant underspecification An i
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5 The uses of valency: A bridge fro
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Returning to a research view concer
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5.2 Valency instantiation: From sec
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Note that valency is treated as a f
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REMOVE (@%vt) (0 @%vK) (*1C @
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word order can't be counted on to m
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than by asking ‘is it an A?’ or
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hemisphere membership 218 , - ‘SW
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disambiguate the senses ‘suit’
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In all, the parser uses 16 atomic s
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‘+ uninferable positive feature +
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6.5 A semantic Constraint Grammar I
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capable - by “negative instantiat
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LIST = (@=c @=v @=p @=s @=t) ; LIS
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um verão ‘a summer’ * ok. * f
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An example of argument-head polysem
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The program module implementing the
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REMOVE (@=X) (*1 @%jn BARRIER @NON-
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@AUX, 'know how to, can' @MV, 'ta
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Note that the MT engine will choose
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Even where none of the semantic rul
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A casa revista PCP @N< revista PC
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O Itamarati +HUM @SUBJ The Itamara
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and a morphological CG module may c
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• V-trees - vertical tree structu
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descriptional complexity: 'full tag
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Here, each line of the CG-notation
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7.2 Grammar teaching on the Interne
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system's disposal. After acquiring
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the reach of "subject"-ness or "obj
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provided and what choices can be ma
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terminological confusion ? term not
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The tree structure of the sample se
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(5) Syntactic tree structures (VISL
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two function tags, since the studen
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7.3 Corpus research In the case of
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- 428 -
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The NURC speech corpus (“Norma ur
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7.4 Machine translation 7.4.1. A te
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processors used by translators or l
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The following diagram shows how dif
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8 Conclusion: The advantages of inc
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- 440 -
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Sources: English: EngCG: Karlsson e
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(4) Table: syntactic tree structure
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lexicon which ensure removal of fal
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8.2 CG Progressive Level Parsing: G
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Methodologically, it is commonly cl
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$ the dollar sign is used to mark n
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@#ICL-AUX< argument verb in verb ch
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"unit" noun (e.g. "20 metros") att
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SEMANTIC TAGS The tables below prov
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ANIMATE NON-HUMAN, NON-MOVING bo 13
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stof 136 fabric seda ‘silke’ ma
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(-CONCRETE, - MASS, +COUNT) ‘modu
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ax 25 plus below: (-CONCRETE, -MASS
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cI 199 process (-CONTROL, imperfect
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oot search lexicon search takes a w
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translation, prepares bilingual lex
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in a typical van/von-name chain con
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Appendix: Example sentences The fol
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é [ser] V PR 3S IND VFIN @FMV quas
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será [ser] V FUT 3S IND VFIN @FMV
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julgamento [julgamento] N M S @P< $
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Os [o] DET M P @>N sabonetes [sabo
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parte [parte] N F S @P< de [de] PR
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inesquecíveis [inesquecível] ADJ
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Literature Almeida, Napoleão Mende
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Lindberg, Nikolaj, “Learning Cons
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Alphabetical index Page numbers in
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averbal subclauses;254 finite subcl
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attributive;249 nominal;248 finite
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for auxiliary definition;235;237 pa
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subject identity test;236 subjects
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ERROR: rangecheck OFFENDING COMMAND
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Eckhard Bick - VISL

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