ISO 25639-1:2008 specifies terms and definitions that are commonly used in the exhibition industry. They are grouped into the following four categories:
- individual and entity, which lists and classifies the various types of people involved in the exhibition industry,
- type of event, which defines the different types of exhibitions and their related meetings,
- physical item, which describes the various component sizes of the exhibition, the types of facility and print material, and
- miscellaneous.