> For the complete documentation index, see [llms.txt](https://help.santesuite.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.santesuite.org/santedb/data-and-information-architecture/conceptual-data-model/entities/state-machine.md).

# State Machine

Entities also support a basic series of states which identify the current status of the entity in the SanteDB data model. Figure 7 illustrates the states of an entity and the valid transitions.

![Figure 7 - Entity State Diagram](/files/-LZu1aFpVAtACCgeqc3N)

The states of the entity are:

* **New :** The entity instance was just created, and no processing, storage, or business rules have been executed.
* **Active :** The entity has been persisted, any necessary review and/or processing has occurred, and the entity record is active.
* **Nullified :** Indicates that the entity was created in error, the entity never existed.
* **Obsolete :** Indicates that the entity did exist, however it no longer is active.