Difference between revisions of "Morphological disambiguator"

Revision as of 06:50, 23 February 2017

Imagine you have a word that has two different tagsets, e.g.

^houses/house<n><pl>/house<v><tv><p3><sg>$
^this/this<det><dem><sg>/this<pron><dem><sg>$

Normally your analyser will randomly choose one of these. Now imagine you have a sentence where the wrong analysis is chosen (in this case, twice!):

^The/The<det><def>$ ^motel/motel<n><sg>$ ^houses/house<n><pl>$ ^this/this<pron><dem><sg>$ ^dog/dog<n><sg>$^./.<sent>$

The goal of a disambiguator is to choose the correct analysis based on the surrounding words.

Constraint Grammar (CG) is a formalism for making context sensitive rules to select or remove analyses from the list of possible analyses.

Example above

@@ Line 4: / Line 4: @@
   ^this/this<det><dem><sg>/this<pron><dem><sg>$
-Normally your analyser will randomly choose one of these.  Now imagine you have a sentence where the wrong analysis is chosen:
+Normally your analyser will randomly choose one of these.  Now imagine you have a sentence where the wrong analysis is chosen (in this case, twice!):
   ^The/The<det><def>$ ^motel/motel<n><sg>$ ^houses/house<n><pl>$ ^this/this<pron><dem><sg>$ ^dog/dog<n><sg>$^./.<sent>$
 The goal of a disambiguator is to choose the correct analysis based on the surrounding words.
 == Using Constraint Grammar to disambiguate ==