Marcin Trzmielewski is a doctoral student in Information, Communication and Documentation at Paul-Valéry University in Montpellier (France). He is currently working on his thesis, the “ALLERGIDOC” project, which aims to assess the informational practices of allergy professionals and to develop a model for organizing knowledge in this medical field. Since 2018, he has also been working on the integrative classification of levels, a faceted classification developed by an international team of researchers. He is an active member of the International Society for Knowledge Organization, the French Association of Information and Documentation Professionals and the World Allergy Organization. He was awarded for the Best Paper Award at the ISKO conference in Porto (2018), and for the Junior Member Grant at the World Allergy Congress in Lyon (2019), and his doctoral project was selected for funding by the Occitanie Region. (2019).