| #

## Expressions

An expression is data that has a certain structure. For example, credit card numbers typically have 16 digits and appear in the format "nnnn-nnnn-nnnn-nnnn", making them suitable for expression-based detections.
Administrators can use predefined and customized expressions.
For details, see Predefined Expressions and Customized Expressions.
Related information

- Predefined Expressions
- Customized Expressions
- Adding and Editing Expressions
- Importing Expressions