# Protected entities
The following entities can be made protected, via their `isProtected` flag:

*   <a class="reference-link" href="../Architecture/Database/Database%20structure/attachments.md">attachments</a>
*   <a class="reference-link" href="../Architecture/Database/Database%20structure/notes.md">notes</a>
*   <a class="reference-link" href="../Architecture/Database/Database%20structure/revisions.md">revisions</a>