Module lexicon 

Lexicon: Vocabulary lookup functions

This module includes the compile-time generated lexicon lookup code from build.rs. It provides ~56 lookup functions for classifying words.

Structs

AdjectiveMetadata

Static adjective metadata from the lexicon database.

CanonicalMapping

Maps a word to its canonical form with polarity.

Lexicon

Lexicon struct for verb lookup with inflection handling

MorphRule

Morphological derivation rule from lexicon.

MorphologicalRule

Morphological rule for derivational morphology.

NounMetadata

Static noun metadata from the lexicon database.

StaticLexicon

Static lexicon implementation using compile-time generated data

VerbEntry

Verb entry returned from irregular verb lookup.

VerbMetadata

Static verb metadata from the lexicon database.

Enums

Aspect

Grammatical aspect (viewpoint aspect).

Case

Grammatical case (for pronouns).

Definiteness

Article definiteness for noun phrases.

Feature

Lexical features that encode grammatical and semantic properties of words.

Gender

Grammatical gender (for pronouns and agreement).

Number

Grammatical number for nouns and agreement.

Polarity

Polarity for canonical mapping (positive = synonym, negative = antonym).

Sort

Semantic sorts for type checking.

Time

Temporal reference for verb tense.

VerbClass

Vendler’s Lexical Aspect Classes (Aktionsart)

WordAnalysis

Result of smart word analysis for derivational morphology

Traits

LexiconTrait

Lexicon trait for abstracting over static and dynamic lexicons

Functions

analyze_word

Smart word analysis with derivational morphology support.

get_canonical_noun

Get the canonical lemma for a noun.

get_canonical_verb

Get canonical verb form and whether it’s lexically negative. Used at parse time to transform “lacks” → (“Have”, true). Returns (canonical_lemma, is_negative).

get_morphological_rules

Get morphological derivation rules from lexicon.

is_adjective

is_adverb

is_agentive_noun

Check if a noun is agentive (derived from a verb with Agent relation).

is_base_verb

is_base_verb_early

is_collective_verb

is_common_noun

is_derivable_noun

Check if a word is a known common noun or derivable from one. This is used for sentence-initial capitalization disambiguation.

is_disambiguation_not_verb

is_distributive_verb

is_ditransitive_verb

is_event_modifier_adjective

is_female_name

is_female_noun

is_gradable_adjective

is_infinitive_verb

is_intensional_predicate

is_irregular_plural

is_male_name

is_male_noun

is_mixed_verb

is_neuter_noun

is_non_intersective

is_not_adverb

is_noun_pattern

is_object_control_verb

is_opaque_verb

is_particle

is_performative

is_preposition

is_proper_name

Check if a word is a proper name (has Feature::Proper in the lexicon). Used to distinguish “Socrates fears death” from “Birds fly” (bare plurals). Names like “Socrates”, “James”, “Chris” end in ‘s’ but aren’t plural nouns.

is_raising_verb

is_scopal_adverb

is_stemming_exception

is_subject_control_verb

is_subsective

is_temporal_adverb

lookup_adjective_db

lookup_agentive_noun

Lookup the base verb for an agentive noun (e.g., dancer -> Dance). This is for backward compatibility with existing code.

lookup_article

lookup_auxiliary

lookup_canonical

Look up canonical form for a word (synonym/antonym normalization). Returns the canonical lemma and polarity (Negative for antonyms).

lookup_irregular_verb

lookup_keyword

lookup_noun_db

lookup_noun_derivation

Lookup the derivation info for a noun (e.g., dancer -> (Dance, Verb, Agent)) Returns (root, pos, relation) if the noun has a derivation.

lookup_phrasal_verb

lookup_presup_trigger

lookup_pronoun

lookup_sort

lookup_unit_dimension

lookup_verb_class

lookup_verb_db

needs_e_ed

needs_e_ing

singularize

word_to_number