English grammar

The English grammars here presented are used for representing English sentences into UNL (UNLization) and for generating English sentences from UNL graphs (NLization). They follow the syntax defined at the UNL Grammar Specs and have been used for IAN and EUGENE, i.e., they work on the sentence level. As a still ongoing work, they cover yet a rather small set of constructions, but may be used as strategy to address the constructions of the Corpus500.

Common features

The following features

SHEAD = beggining of the sentence (system-defined feature assigned automatically by the machine)

CHEAD = beginning of a scope (system-defined feature assigned automatically by the machine)

STAIL = end of the sentence (system-defined feature assigned automatically by the machine)

CTAIL = end of a scope (system-defined feature assigned automatically by the machine)

BLK = blank space (feature assigned by the dictionary - the entry [ ]{}""(BLK)<;;>; must be included in the dictionary)

DIGIT = UW is digit (feature assigned by the dictionary - this feature should be associated to the entries whose UW is a digit)

PUT = punctuation sign (feature assigned by the dictionary - this feature should