The paper discusses factors that are relevant when constructing a typology of concept relations for terminology work by focusing especially on ISO 704:2009 Terminology work - Principles and methods and ISO 1087-1:2000 Terminology work - Vocabulary - Part 1: Theory and application standards and their future revisions. At first prerequisites for a concept relation typology are discussed generally. The standards are then scrutinized as to how they introduce, define and classify concept relation types, and modifications are suggested. A concept relation typology is presented as an example of a comprehensive, generalizable and extendable typology.