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DiSK: A Diffusion Model for Structured Knowledge

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arxiv 2312.05253 v2 pith:XKHTP5KY submitted 2023-12-08 cs.LG cs.AI

classification cs.LGcs.AI
keywords structureddatadiskmodelsdiffusionknowledgemodelapproach
verification ladder T0 review T1 audit T2 compute T3 formal
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Structured (dictionary-like) data presents challenges for left-to-right language models, as they can struggle with structured entities for a wide variety of reasons such as formatting and sensitivity to the order in which attributes are presented. Tabular generative models suffer from a different set of limitations such as their lack of flexibility. We introduce Diffusion Models of Structured Knowledge (DiSK) - a new architecture and training approach specialized for structured data. DiSK handles text, categorical, and continuous numerical data using a Gaussian mixture model approach, which allows for improved precision when dealing with numbers. It employs diffusion training to model relationships between properties. Experiments demonstrate DiSK's state-of-the-art performance on tabular data modeling, synthesis, and imputation on over 15 datasets across diverse domains. DiSK provides an effective inductive bias for generative modeling and manipulation of structured data. The techniques we propose could open the door to improved knowledge manipulation in future language models.

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