What does the '-' symbol separate in control marking syntax?

The '-' symbol serves an important function in control marking syntax as it separates a control marking from its sub-control. This means that when you see a control marking followed by a '-', it is indicating a relationship where the existing control marking has additional specifications or requirements attached to it. This structuring allows for greater clarity and organization in how classified information is indicated, ensuring that all aspects of the control are understood clearly.

In practical terms, this means that a primary control marking (such as "Confidential") may have a sub-control that alters or specifies the management or handling of that information, leading to better information control practices. Understanding this separation is crucial for compliance with various information management regulations and for maintaining the integrity of sensitive data.