Users consider domain labels one of the most important data categories in LSP collections, especially multi-domain ones. In the 1980s, the need for a domain classification specifically designed for the purposes of terminology management has been discussed actively, but such a classification seems to have never been created or at least made public. In the TermFactory project which is aimed at creating a platform and a workflow for collaborative ontology-based terminology work, it has been decided to create a dedicated domain classification that would be multilingual, generic (not too culture- and language-specific), based on widely acknowledged divisions, simple, user-friendly and extensible. In my paper, I discuss the reasons for using a domain classification in a term bank, consider some general problems in the compilation of domain classifications, and describe the principles of compilation of the TermFactory core domain classification.Peer reviewe