# Identifiers

### Add an identifier to entity

1. Click "Add category identifier"
2. Set identifier [details](https://docs.struct.com/reference/settings/data-models/catalogues/identifiers/identifier-details)
3. Click "Save"

### Edit identifiers on entity

1. Modify identifier [details](https://docs.struct.com/reference/settings/data-models/catalogues/identifiers/identifier-details)
2. Click "Save"

### Delete identifiers on entity

1. Click the "Trash can"-icon of the identifier you wish to delete
2. Click "Save"