Artificial intelligenceLesson 3 of 4 in the course Knowledge representation

Semantic Networks: Structure, Lexical Relations, and Applications

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

A semantic network represents knowledge by showing concepts and the relationships between them. This lesson introduces the basic structure of a network and explains how its parts encode meaning.

A semantic network—also called a frame network—is a knowledge base that represents semantic relations between concepts. It is commonly modeled as a graph.

All flashcards

What is a semantic network?
A knowledge base that represents concepts and the semantic relations connecting them, commonly using a graph.
What are nodes and edges in a semantic network?
Nodes represent concepts or entities; edges represent semantic relations between nodes.
What is a semantic triple?
A fact represented as a subject, a relation, and an object.
What is inheritance in a semantic network?
A more specific concept receives properties associated with a broader category linked to it.
What is spreading activation?
Activation of one concept spreads through links to related concepts in the network.

Quiz questions

  1. What does a directed edge indicate in a semantic network?Answer: The relation has a particular direction.
  2. If concept A is a part of concept B, which WordNet relation describes A in relation to B?Answer: Meronymy
  3. What is WordNet?Answer: An English lexical database that groups words into synsets and records relations between them.
  4. What does the proto-object idea propose about a node in a semantic network?Answer: It is a structured representation of a concept, not merely an isolated label.
  5. Which pair of tasks can semantic networks support in natural language processing?Answer: Semantic parsing and word-sense disambiguation

Based on the Wikipedia article Semantic network, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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