On how to write rules in Constraint Grammar (CG-3) - VISL
On how to write rules in Constraint Grammar (CG-3) - VISL
On how to write rules in Constraint Grammar (CG-3) - VISL
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Substitutions<br />
➢ Replaces a tag or tag cha<strong>in</strong> with another, useful for:<br />
correct<strong>in</strong>g <strong>in</strong>put from other modules, e.g. probabilistic taggers<br />
SUBSTITUTE (KS) ( INDP) TARGET ("that") (*1C VFIN BARRIER<br />
NON-ADV) (*-1C N BARRIER NON-ADV)<br />
<strong>in</strong>sert<strong>in</strong>g, chang<strong>in</strong>g and remov<strong>in</strong>g secondary tags<br />
SUBSTITUTE (N) ( N) TARGET N IF (c ART-DEF OR DET-DEF)<br />
correct<strong>in</strong>g lower level <strong>CG</strong> once higher lever <strong>in</strong>formation is available<br />
spell or grammar checkers<br />
SUBSTITUTE (UTR) (NEU) TARGET (@ + NEU)<br />
➢ Usually as a special section (CORRECTIONS or BEFORE-<br />
SECTIONS), but <strong>in</strong> cg3 allowed anywhere<br />
➢ Strictly ordered<br />
SUBSTITUTE (X) (Y) TARGET (...) IF (...)<br />
➢ SUBSTITUTE does not "close" a l<strong>in</strong>e for mapp<strong>in</strong>g<br />
➢ SUBSTITUTEd tags can be "seen" by later SUBSTITUTE or<br />
Mapp<strong>in</strong>g <strong>rules</strong>, even <strong>in</strong> the same section
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