WHAT IS DISCOURSE ANALYLISIS

CHAMBA

LEXICOGRAPllER

Is an expert system designed primarily for natural language processing purposes.

The system consists of two basic components

Lexical database (LBD)

Bibliographic database (BBD)

Lexical database (LBD)

LBD is a vocabulary presented in a machine-readable machine-readable form and consisting of several domains, as in a usual relational database.

Bibliographic database (BBD)

In the DB, for each lexeme or semantic feature all documents containing lexicographically useful
lexicographically useful information about that lexeme or feature.

4. SEMANTIC FEATURES AND SELECTION RESTRICTIONS IN LEXICON AND GRAMMAR

4. SEMANTIC FEATURES AND
SELECTION RESTRICTIONS IN
LEXICON AND GRAMMAR

Evolution of Semantic Features

Semantic features were vital in 60s semantic analysis.

Semantic features were vital in 60s semantic analysis.

By the 70s and 80s, semantic features took a secondary role, but recent trends argue for their importance.

Semantic Features in NLP

Semantic features viewed as subsidiary in NLP systems in the past.

Semantic features viewed as subsidiary in NLP systems in the past.

Argues for the significance of semantic features in modern semantics, even in complex contexts.

Semantic Features vs. Syntactic Features

Suggests semantic features, not syntactic ones, regulate selection restrictions.

Suggests semantic features, not syntactic ones, regulate selection restrictions.

Anna Wierzbicka asserts grammar's selection restrictions are motivated by semantic features.

Semantically Motivated Selection Restrictions

Many syntactic restrictions prove to be semantically motivated.

Examples include Neg-Raising predicates and Russian conjunctions following specific semantic components.

Semantic Invariants in Predicate Classes

Identifies a semantic invariant in predicates introducing indirect questions.

Semantic component 'X knows' influences the semantic options of certain predicates.

Semantic component 'X knows' influences the semantic options of certain predicates.

5. ON SEMANTIC IN-VARIANT OF THE CLASS OF WORDS WITH GENITIVE SUBJECT

5. ON SEMANTIC IN-VARIANT OF THE
CLASS OF WORDS WITH GENITIVE
SUBJECT

Case Choice in Genitive Subject Construction

Examines case selection in genitive subject construction in Russian.

Notes instances where nominative is also possible, introducing syntactic features of verbs.

Notes instances where nominative is also possible, introducing syntactic features of verbs.

Syntactic Feature and Semantic Affinity

Asserts case choice linked to a syntactic feature in verb groups.

Apresjan's list of over two hundred verbs, emphasizing the role of a unique syntactic feature.

Apresjan's list of over two hundred verbs, emphasizing the role of a unique syntactic feature.

Semantic Invariant in Genitive Verbs

Introduces the concept of genitive verbs with a semantic invariant.

Two distinct but related semantic components explain the use of genitive subjects in negative sentences.

Two distinct but related semantic components explain the use of genitive subjects in negative sentences.

Cognate Semantics in Genitive Subject Groups

Group I and Group II genitive subjects determined by different, yet cognate, semantic components.

Explains conversational implicatures related to the absence of an object in the field of vision.