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The present report outlines and summarises the activity of the Archaeological Excavation Modelling Working Group, a sub-group that was formed within WP 4.4.12. The group has been active since June 2020. The group was formed to investigate the potential of developing an Application Profile for excavation data, explore the current state of excavation data modelling and propose a roadmap for further activities. During the ARIADNEplus project, group participants have convened eight times, organised a virtual workshop on excavation data modelling and prepared two presentations, one at an ARIADNEplus meeting and another targeting wider audiences (EAA2022). The entire work of the group is summarised in the present report and attached annexes.