An ontology model for the reality-based 3D annotation of Heritage Building Conservation state Journal of Cultural Heritage 2 of interconnected 3D annotations (2D/3D spatial regions related to semantic concepts), this dedicated ontology integrates data, information and knowledge for describing and monitoring stone degradation phenomena in order to assist Cultural Heritage experts within the decision-making process. Our approach for the reality-based 3D annotation of heritage buildings, related to the formal representation of structured knowledge belonging to its scientific observation, represents a promising way for guiding the collaborative analysis of the conservation state towards the progressive implementation of a shared and consensual representation of this domain knowledge.

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