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Control-DAG: Constrained Decoding for Non-Autoregressive Directed Acyclic T5 using Weighted Finite State Automata
April 11, 2024, 4:47 a.m. | Jinghong Chen, Weizhe Lin, Jingbiao Mei, Bill Byrne
cs.CL updates on arXiv.org arxiv.org
Abstract: The Directed Acyclic Transformer is a fast non-autoregressive (NAR) model that performs well in Neural Machine Translation. Two issues prevent its application to general Natural Language Generation (NLG) tasks: frequent Out-Of-Vocabulary (OOV) errors and the inability to faithfully generate entity names. We introduce Control-DAG, a constrained decoding algorithm for our Directed Acyclic T5 (DA-T5) model which offers lexical, vocabulary and length control. We show that Control-DAG significantly enhances DA-T5 on the Schema Guided Dialogue and …
abstract application arxiv autoregressive control cs.cl dag decoding errors general generate language language generation machine machine translation natural natural language natural language generation neural machine translation nlg state tasks transformer translation type
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