Boolean
A boolean type is typically a logical type that can be either "true" or "false".
ODM2 Property Data Type Controlled Vocabulary
ODM2 Working Group
A vocabulary for describing the data type for an extension property in ODM2. Extension properties can be added to many of the entities in ODM2 (e.g., Sites, Variables, etc.). The values of these extension properties must be of one of the listed primitive data types.