9.1813, Review: Cook: Case Grammar Applied

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LINGUIST List:  Vol-9-1813. Sun Dec 20 1998. ISSN: 1068-4875.

Subject: 9.1813, Review: Cook: Case Grammar Applied

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1)
Date:  Fri, 18 Dec 1998 09:24:28 +0100
From:  Tania Avgustinova <tania at coli.uni-sb.de>
Subject:  Review: Cook: Case Grammar Applied

-------------------------------- Message 1 -------------------------------

Date:  Fri, 18 Dec 1998 09:24:28 +0100
From:  Tania Avgustinova <tania at coli.uni-sb.de>
Subject:  Review: Cook: Case Grammar Applied


Walter A. Cook. S.J. (1998) "Case Grammar Applied" A Publication of The
	Summer Institute of Linguistics and The University of
	Texas at Arlington, 1998, 271 pages


Reviewed by Tania Avgustinova, University of Saarland.


SYNOPSIS

The book is intended as a companion volume to "Case Grammar Theory" (1989) by
the same author, and is devoted to the application of the model developed in
this earlier publication to English text analysis. This in particular means
that the main stress of the present work is on methodological issues, which are
presented on an extended textual analysis of Hamingway's "The Old Man and the
Sea".

The actual goal of the discussed monograph is twofold: for the grammar - to
present a method for sentence semantics which describes the meaning underlying
each simple sentence; for the lexicon - to present a method for further
defining each sense of each verb / predicate in terms of semantic classes
(case-frame-based typology). Each clause in its underlying structure is reduced
to a kernel sentence which is defined as a simple complete active-voice
affirmative statement. All texts are reduced to a sequence of kernel sentences

The model used is the Case Grammar Matrix Model. It presents a clear
predicate-argument structure, builds a lexicon which distinguishes various verb
senses, and not only describes arguments occurring in the text, but through
covert roles, describes implicit arguments. This model is supplemented by the
use of conceptual graphs, following Sowa (1984). Each verb type has a
generalised conceptual graph to indicate the predicate-argument structure; and
each example in the text contains the canonical graph of that sentence using
the verb and nouns as concepts, and case labels as the verb-to-noun relations.

The book is organised in the following way.

Chapter 1 (pp.1-54) presents the Case Grammar Matrix Model in summary form and
introduces conceptual graph representation.
The next four chapters treat verbs / predicates in four distinguished semantic
domains.

Chapter 2 (pp.55-90) deals with the Basic domain that includes all State,
Process, and Action verbs which use only the Agent and Object cases.

Chapter 3 (pp.91-126) deals with the Experiential domain, the domain of
sensation, emotion, cognition, and communication. It involves State, Process,
and Action verbs which include an Experiencer case in their descriptions.

Chapter 4 (pp.127-42) deals with the Benefactive domain, the domain of
possession and transfer of property, and describes State, Process, and Action
verbs that include a Benefactive case.

Chapter 5 (pp.143-82) deals with the Locative domain, the domain of physical
location and movement, and describes State, Process, and Action verbs that
include a Locative case.

Chapter 6 (pp.182-220) deals with other elements involved in the logical
representation of sentences, including tense, aspect, modals, performatives,
and negatives, showing how these elements may be included in the logical
structure, and ending with a sample sentence parse using Case Grammar.

Chapter 7 (pp.221-46) summarises the analysis of more than 500 examples in
chapters 2 through 5 and demonstrates the verbal hierarchy expressed by the
twelve cells of the Case Grammar Matrix, organised by verbal domain, verb type,
and argument structure. Each of the verb types is described together with its
conceptual graph, its frequency of occurrence, its subtype, and its defining
characteristics.

The appendix to the text contains an alphabetical lexicon, listing all of the
verbs / predicates in the examples together with their case frames (pp.247-52),
and a case lexicon, with the verbs sorted by case frame together with
references for each verb to the pages where the use of the verb is exemplified
(pp.253-60).
Finally, there is a list of references (pp.261-6), and an index (pp.267-71).

CRITICAL EVALUATION

Case Grammar (CG) works with labelled predicate-argument structure, and thus,
in its core, belongs to the Dependency Grammar paradigm. CG develops a semantic
valence system that describes the logical form of a sentence in terms of a
central predicate (usually and typically a lexical verb, but also a predicate
adjective, a predicate noun, or a predicate adverb) and a series of
case-labelled arguments (nominal, adverbial) required by the meaning of that
predicate. So, the type of case considered in the book is 'governed case', and
in fact, nothing is said about the way CG model would treat 'concordial case' -
cf., e.g., Blake (1994) for a detailed discussion of these notions. There is no
case concord in English and, hence, the challenges posited by 'concordial case'
are trivially out of the scope of the presented analysis (which is based
exclusively on English data).

The ambition of the proponents of CG is to develop a semantic interpretation
system that is universal across languages, and not tied to the syntax of any
particular sentence. On the basis of the presented extensive data analysis it
is claimed that the five case labels used in the work (i.e. Agent, Object,
Experiencer, Benefactive, and Locative) are necessary and sufficient for the
description of all the verbs / predicates in the language (in this case
English). The possibility of creating different lists of cases is left open,
whereby full translatability is theoretically expected between any consistent
list of cases and the one employed in the CG matrix model.

Both the predicate and its arguments are viewed as concepts (i.e. the
conceptual universe is made up of verbs which describe states or events, and
nouns which describe things), while the case role labels indicate relations
(which arguments bear to their predicates). CG is written in conceptual graph
format by placing the concepts (predicates, arguments) in boxes and relations
(case roles) in circles. The arrows in the notation point away from the
predicate which is the source of the case relations. An advantage of such an
approach is the possibility of defining the default position of the lexical
predicate in its case frame, i.e. with respect to the arguments it governs.

In the discussed book, a fairly credible ontology of predicators is achieved by
hierarchically sorting them according to domain as Basic, Experiential,
Benefactive, Locative, (and possibly) Time, and within each domain as State,
Process, Action. Further sub-classification of the predicates is based on the
number or the position of the arguments. The resulting hierarchical taxonomy is
similar to a thesaurus in which all entities are organised into semantic
domains. The organisation of the semantic domains is worked out in detail and
with precision.

The question of case inventory is central to CG, as well as to any theory
working with the notion of case. Also methodologically, a clear distinction
must be made between essential cases, which are required by the meaning of the
predicate, and modal case, which are mainly adverbial adjuncts. Only essential
cases can be used for describing predicates. Despite of the lack of universal
agreement on the number of case role labels or the way in which they are
defined, the author gives a clear step-by step method, accompanied by various
concrete tests, how to simplify in practice the case assignment. Thus, the
labelling is deferred until three basic questions are answered: How many
arguments are required by the verb? What verb type - state, process, or action
- is in the structure? To what semantic domain does the verb belong? Then, the
naming of the arguments can be simplified by a set of principles, in
combination with a set of tactics for the formation of case frames. Within case
frames, cases are listed left-to-right according to a subject choice hierarchy
(Agent-Experiencer-Benefactive-Object-Locative) which is merely a
generalisation covering the unmarked choice. Marked choices which violate the
subject choice hierarchy are indicated in the lexicon by changing the order of
cases in the case frame. Possible variations involve "equatives" (in copular
constructions), regarded in this model as Double-Object frames in the Basic
domain, and rank shifts in the subject choice hierarchy.

In the lexicon, predicators are classified according to case frames. The case
frame is understood as a configuration of one to three cases that are required
by the meaning of the verb (or more generally, the predicate). Let us remind,
however, that, in lexical semantics research, cases are known where the frame
would contain up to five slots. A famous example is the verb 'to rent'
(Russian: arendovat' - cf. Apresjan (1974) p.134) involving the following
arguments: (1) who, (2) what, (3) from whom, (4) for how much, (5) for how
long.

Special attention is devoted to the possibility of lexicon organisation in
terms of derivations intended both to represent linguistic generalisations and
to simplify the lexicon (sections 1.13 - 1.15). However, the method followed in
the work is listing each item separately and supplementing the lexicon with
redundancy rules that relate these lexical entries to each other. Also, each
sense of each predicate is treated as a separate item with its own case frame.

In order to set the guidelines for applied CG textual analysis, a concise
introduction to the principles of lexical decomposition and to the
interpretation of covert case roles is given. Lexical decomposition is
understood as the process of analysing predicates as consisting of more basic
atomic predicates. With some sentences this is unavoidable for determining the
actual predicate-argument structure.

Covert case roles, which are required by the meaning of the predicate, are
sometimes (as in the case of partially covert (deletable) case roles) or always
(as in the case of totally covert (coreferential and lexicalised) case roles)
missing in the surface structure. Since the CG analysis advocated for in this
book maintains the obligatory object hypothesis, covert roles assume greater
importance. In all cases where the Object role can be sometimes deleted, or can
be coreferential with another role, or can be lexicalised into the predicate, a
deeper analysis is needed to find the obligatory object. Certainly, the
lexicalisation of the manifestation of propositional, essential roles is of
primary interest in the context of revealing the central predicate in a
sentence.

The assumption that a predicate, even with covert (hidden) case role, has to be
defined in terms of its full complement of case roles requires a clear
distinction between deletable, coreferential and lexicalised roles. The author
offers in this respect not only theoretical background but also concrete tests,
procedures and instructions to guide and facilitate practical analysis. Two
methodological principles are postulated ensuring that all conceptual relations
flow from the central verb, and that deletable roles are included in case
descriptions.

A major asset of the book is, with no doubt, the extensive textual analysis
performed with precision, consistency and conformity to the postulated
principles and theoretical assumptions. The limits of the approach are
realistically recognised by the author, and are stated explicitly in the
appropriate places throughout the presentation. The reader will find a
well-developed and detailed ontology of predicates, which covers not only verbs
but also predicative adjectives, predicative nouns and predicative adverbs. The
most important linguistic phenomena are considered in a systematic and
easy-to-follow way. This makes the book a valuable guide to a practical
sentence analysis, as well as a useful reference material for research purposes
and computer applications.

REFERENCES

Apresjan, Jurij D. 1974: Leksicheskaja semantika. Sinonimicheskie sredstva
jazyka. Moskva: Nauka

Blake, Barry J. 1994: Case. Cambridge Textbooks in Linguistics.

Cook, Walter A., S.J. 1989: Case grammar theory. Washington, D.C.: Georgetown
University Press.

Sowa, John F. 1984: Conceptual graphs: Information processing in mind and
machine. Reading, Mass.: Addison- Wesley.

===============
Tania Avgustinova, Ph.D.
Computational Linguistics, University of Saarland
Postfach 151150, 66041 Saarbruecken, Germany
tania at coli.uni-sb.de, http://www.coli.uni-sb.de/~tania/
(+49) (681) 302.4504 (phone)
(+49) (681) 302 4115 (secretary)
(+49) (681) 302.4700 (fax)



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