The paper continues the research of user modeling (UM) field on visionary level. It proposes possible views on meta-ontology of the user modelling field based on the results of a workshop and analysis of a call for papers. Ontology is meant to structure the state-of-the-art in the field and serve as a central reference point and as a basis to index systems, papers and learning media. The domain has the bias on ubiquitous UM. The paper presents more questions than answers. It is a bit provocative as it is intended stir a debate within UM community of researchers.