Building knowledge-grounded dialogue systems with graph-based semantic modelling

Yizhe Yang, Heyan Huang, Yang Gao*, Jiawei Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The knowledge-grounded dialogue task aims to generate responses that convey information from given knowledge documents. However, it is a challenge for the current sequence-based model to acquire knowledge from complex documents and integrate it to perform correct responses without the aid of an explicit semantic structure. To address these issues, we propose a novel graph structure, Grounded Graph (G2), that models the semantic structure of both dialogue and knowledge to facilitate knowledge selection and integration for knowledge-grounded dialogue generation. We also propose a Grounded Graph Aware Transformer (G2AT) model that fuses multi-forms knowledge (both sequential and graphic) to enhance knowledge-grounded response generation. Our experiments results show that our proposed model outperforms the previous state-of-the-art methods with more than 10% gains in response generation and nearly 20% improvement in factual consistency. Further, our model reveals good generalization ability and robustness. By incorporating semantic structures as prior knowledge in deep neural networks, our model provides an effective way to aid language generation.

Original languageEnglish
Article number111943
JournalKnowledge-Based Systems
Volume298
DOIs
Publication statusPublished - 15 Aug 2024

Keywords

  • Knowledge acquisition
  • Knowledge fusion
  • Knowledge-grounded dialogue
  • Natural language generation

Fingerprint

Dive into the research topics of 'Building knowledge-grounded dialogue systems with graph-based semantic modelling'. Together they form a unique fingerprint.

Cite this