Among the options provided, calm_unique is the standard built-in macro provided by the Self-Service engine.
Purpose:The @@{calm_unique}@@ macro generates a unique, short alphanumeric string at runtime.
Use Case:It is widely used in Blueprints to ensure uniqueness for VM names, hostname prefixes, or other resources that cannot have duplicate identifiers within the infrastructure (e.g., naming a VM Web-@@{calm_unique}@@ to prevent naming collisions).
Other Options:calm_date, calm_generate_uuid, and calm_math are not standard built-in macro names in the Self-Service macro library (though calm_time and calm_now exist for time-based operations).
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