Language Processing with Perl and Prolog by Pierre M. Nugues

Author:Pierre M. Nugues
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

Fig. 11.5Graph representing a feature structure

Fig. 11.6Graph corresponding to embedded feature structures

Grouping a set of features into a substructure enables the simplification of notations or rules. A feature denoted agreement can group gender, number, and person, and can be encoded as a single structure. German nominative and accusative pronouns er ‘he’ and ihn ‘him’ can then be represented as:

which enables us to simplify the noun phrase rule in:

We can even push categories into structures and rewrite the previous rule as

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