The document discusses linguistic reference and referring expressions. It explains that reference involves using language to allow a listener or reader to identify something, and that referring expressions like proper nouns, pronouns, definite nouns, and indefinite nouns are used for reference. It also discusses the importance of context, co-text, inference, antecedents, and anaphors in successful reference. Referring expressions must be interpreted based on the speaker's assumptions and knowledge shared with the listener.