[L] Lookup (DB Field Attribute)

Parameter is the database path that is to be looked up in the form of TableName|Alias|FieldName where it may be a specific fixed path or you may use {} to replace one or more of the path components where the value inside the {} is a field name in the current record.

Description:

Perform a dynamic Lookup to determine if a Record/Field exists

Example:

[L] TableName|Alias|FieldName