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## Data Identifiers and Template Creation

Data Loss Prevention includes over 100 predefined templates and data identifiers that administrators can use to create Data Loss Prevention policies. These predefined templates and data identifiers should cover the majority of a company’s Data Protection needs. Trend Micro recommends using the built-in items when creating policies.
If the predefined items do not meet a company’s specific needs, administrators can copy the existing items and modify them accordingly. Select the desired template or data identifier and click Copy. Click the newly created item (<DLP Item>_Copy) to edit the content.

| ##### Note Predefined Data Loss Prevention templates and data identifiers cannot be modified or deleted.

Administrators that require completely new expressions can create unique expressions using the web console. ScanMail Data Loss Prevention expressions follow the Perl Compatible Regular Expression (PCRE) format. Trend Micro recommends testing the user-defined expressions before implementing the new expression in a Data Loss Prevention policy.

| ##### Tip Save the expression only if the testing was successful. An expression that cannot detect any data wastes system resources and may impact performance.

ScanMail allows administrators to import and export Data Loss Prevention templates and data identifiers in DAT files. To edit the contents of a DAT file, import the items back into the ScanMail environment first. Modifying the contents of an exported DAT file can cause data corruption and unusable data.