Building Blocks for Multi-dimensional WebXR Inspection Tools Targeting Cultural Heritage

Data exploration and inspection within semantically enriched multi-dimensional contexts, may benefit of immersive VR presentation when proper 3D user interfaces are adopted. WebXR represents a great opportunity to investigate, experiment, develop and assess advanced multi-dimensional interactive tools for Cultural Heritage, making them accessible through a common web browser. We present and describe the potential of WebXR and a set of building blocks for crafting such immersive data inspection tools, exploiting recent web standards and spatial user interfaces. We describe the current state of the EMviq tool - developed within SSHOC European project - and how it is taking advantage of these components for online immersive sessions. The EMviq tool allows to visually inspect and query an Extended Matrix dataset, allowing to query and explore all the information within the knowledge graph relating to the interpretative datasets - in this paper applied to the case studies of the Roman theatre of Catania and Montebelluna smithy. The main functionalities discussed are spatio-temporal exploration, search and selection of stratigraphic units, and the presentation of metadata and paradata related to the data provenance (both objective and interpretative).