Eckhard Bick - VISL

“base form-1” .. .. WORD CLASS-2 INFLEXION
“base form-2” .. .. WORD CLASS-3 INFLEXION
“base form-2” .. .. WORD CLASS-4 INFLEXION
A rules file ordinarily consists of the following sections:
DELIMITERS (1 section, defines sentence boundaries)
SETS (1 or more lists of set-definitions, compiled as one)
MAPPINGS (1 list of mapping rules for adding context dependent tags)
CONSTRAINTS (1 or more lists of CG-rules, compiled one section at a time)
END
In case there are several constraints sections with constraint grammar rules, these will
be applied to the input text in the same order sections have in the file. This way, it is
possible to distinguish, for instance, between morphological disambiguation, to be done
before, and syntactic disambiguation, to be done after the mapping of syntactic tags.
Comments can be added anywhere in the rules file after a #-sign.
DELIMITERS
The compiler is told which text window the rules are to be applied to. In the case of
PALAVRAS the following punctuation delimiters are included:
;
Note that quotes and single hyphens are not included. This may result in complex
sentences with parenthetical clauses causing trouble for rules based on, e.g., the
uniqueness principle. On the other hand, it is easier to satisfy, for instance, verbal
valency in a larger window.
A few special non-punctuation delimiters are used: which is
automatically added to mark the left hand border of the first sentence in a text, and
which is used for graphical line breaks in news paper corpora, in connection with
otherwise undelimited headlines or pictures.
SETS
In the cg2 compiler, rules can not only apply to word forms or their tags, but also to sets
of words or tags or combinations of these. A set definition is introduced by:
(a) LIST set-name =
followed by a list of set elements (tags or tag combinations), separated by blanks, or
(b) SET set-name =
followed by a list of pre-defined sets (or tags in parentheses), linked by set operators.
Elements in (a) can be:
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