Fig. 7From: ‘‘POLYGNOSIS’’: the development of a thesaurus in an Educational Web Platform on optical and laser-based investigation methods for cultural heritage analysis and diagnosisThe self-explanatory structure of the thesaurus supports in understanding the concept of a term. For example, ‘overpaint’ is a paint (layer) on a painting, but it is also related—although different—to pentimento and inpainting. Moreover, ‘overpaint’ is related to (examined by) Multispectral Imaging, and (analysed by) Raman spectroscopyBack to article page