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arXiv · 2602.08407

Drop the mask! GAMM-A Taxonomy for Graph Attributes Missing Mechanisms

Richard Serrano·Baptiste Jeudy·Charlotte Laclau·Christine Largeron
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Abstract

Exploring missing data in attributed graphs introduces unique challenges beyond those found in tabular datasets. In this work, we extend the taxonomy for missing data mechanisms to attributed graphs by proposing GAMM (Graph Attributes Missing Mechanisms), a framework that systematically links missingness probability to both node attributes and the underlying graph structure. Our taxonomy enriches the conventional definitions of masking mechanisms by introducing graph-specific dependencies. We empirically demonstrate that state-of-the-art imputation methods, while effective on traditional masks, significantly struggle when confronted with these more realistic graph-aware missingness scenarios.

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Richard Serrano, Baptiste Jeudy, Charlotte Laclau, Christine Largeron. 2026-02-09. Drop the mask! GAMM-A Taxonomy for Graph Attributes Missing Mechanisms. https://arxiv.org/abs/2602.08407

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