ISO 24156-1:2014 gives guidelines for using a subset of UML symbols independent of their normal UML meaning, to represent concepts in concept models that result from concept analysis. It describes how UML symbols can be used for that. A UML profile designed for this purpose is used to represent concepts and concept relations in terminology work.
ISO 24156-1:2014 does not describe UML and its general use in depth. These matters are covered in ISO/IEC 19505‑1 and ISO/IEC 19505‑2.
ISO 24156-1:2014 does not describe the principles and methods of terminology work. This is covered in ISO 704.
ISO 24156-1:2014 does not define the fundamental concepts of terminology work. This is covered in ISO 1087‑1.