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## Data Identifier Types

Digital assets are files and data that an organization must protect against unauthorized transmission. You can define digital assets using the following data identifiers:

- Expressions: Data that has a certain structure. For details, see Expressions.
- Keyword lists: A list of special words or phrases. For details, see Keywords.

| ##### Note It is not possible to delete a data identifier that is being used in a DLP template. Delete the template before deleting the data identifier.

Related information

- Expressions
- Keywords