/getting-started/core-entities/index.htmlSome entities are shared across different domains in Bloomeo. These entities enable fine-grained access control and ensure data consistency. This section describes these entities and how to interact with them. Geography, Organization, and Species Hierarchies Geography, Organization, and Species hierarchies organize and determine the scope of all data in Bloomeo. They control data access and facilitate filtering and pre-population of data in forms. Setting up hierarchies is a structural task that should be done by a Bloomeo administrator. Once created, items in a hierarchy cannot be updated or deleted. If changes are needed, create a new item and mark the old one as deprecated.Hugoen-us