# Property types

### Attribute

Allows the user to manage the values of an attribute. For more information, see: [Attributes](https://docs.struct.com/pim3/fundamental-concepts/attributes).

### Created

Displays the creation time and date of the category.

### Entity references

Displays a list of entities referencing this category.

### Internal Id

Displays the internal id of the category.

### Last modified

Displays the time and date of the last modification to the category.

### Workflow state selector

Allows the user to manage the workflow state of the category.