  We develop a diffusion-based approach for various document layout sequence
generation. Layout sequences specify the contents of a document design in an
explicit format. Our novel diffusion-based approach works in the sequence
domain rather than the image domain in order to permit more complex and
realistic layouts. We also introduce a new metric, Document Earth Mover's
Distance (Doc-EMD). By considering similarity between heterogeneous categories
document designs, we handle the shortcomings of prior document metrics that
only evaluate the same category of layouts. Our empirical analysis shows that
our diffusion-based approach is comparable to or outperforming other previous
methods for layout generation across various document datasets. Moreover, our
metric is capable of differentiating documents better than previous metrics for
specific cases.
