Okay, I need to create a Wikipedia-style document about Mandatory Access Control (MAC) under the categories of Technology > Security. Let me start by understanding what MAC is. From what I remember, MAC is a type of access control where the system enforces security policies, unlike Discretionary Access Control (DAC) where users have more control.

First, the structure: H1 for the title "MAC", then an overview section. Next, sections with H2 and H3. Maybe start with an introduction to MAC, then its principles, how it works, examples, advantages/disadvantages, and related concepts. I should also include references or further reading.

I need to make sure the information is accurate. Let me recall that MAC is used in high-security environments like government systems. It uses labels for data and users, right? Like confidentiality levels (e.g., Top Secret, Secret) and categories. Users can only access data with matching labels.

For the principles section, I should explain the core concepts: security labels, clearance levels, and how the system enforces these. Maybe mention the Bell-LaPadula model as an example of MAC. Also, talk about the "no write up" and "no read down" rules.

In the working mechanism part, I can describe how the system checks access requests against the labels. Maybe include a table comparing MAC with DAC and RBAC. That would help readers understand the differences.

Advantages: Enhanced security, prevention of unauthorized data flow. Disadvantages: Complexity in management, potential for reduced flexibility. Examples could be military systems or secure operating systems like SELinux or AppArmor.

I need to check if I'm using technical terms correctly. For instance, "security labels" and "clearance levels" are key terms here. Also, mention that MAC is more rigid than DAC, which allows users to set their own permissions.

Wait, the user mentioned including references. Maybe add some standards or models like the Bell-LaPadula model, or mention systems that use MAC. Also, ensure that each section flows logically, with H2 for main sections and H3 for subsections if needed.

I should avoid being too technical without explanation. For example, when talking about labels, explain what they are in simple terms. Make sure the document is over 800 characters, so I need to elaborate enough on each section.

Let me outline the sections:

1. Title: MAC
2. Overview/Introduction
3. Principles of MAC
4. Security Labels and Clearance Levels
5. Access Control Mechanisms
6. How MAC Works
7. Labeling Process
8. Enforcement Mechanism
9. Examples of MAC Implementation
10. Advantages and Disadvantages
11. Related Concepts (e.g., RBAC, DAC)
12. References

I need to make sure each section has enough detail. For example, in the "How MAC Works" section, explain the steps involved in checking access requests. Maybe use a code block or table for clarity.

Also, check that all information is accurate. For instance, SELinux and AppArmor are examples of MAC in Linux, but I should confirm that. Also, mention that MAC is often used in environments where data confidentiality is critical.

Avoid any markdown formatting except the specified structure. Use H1, H2, H3 as needed. Maybe use bullet points for advantages/disadvantages to make it readable.

I think that's a solid plan. Now, I'll start drafting each section with these points in mind, ensuring clarity and depth.