画像:Catalan number binary tree example.png

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• {{PD-old}} (for works out of copyright where the author has been dead for over 70 years),
• {{PD-Art}} (for photos of old paintings and art out of copyright),
• {{PD-ineligible}} (for trivial work),
• {{PD-USGov}} (for work by the U.S. federal government),
• {{PD-self}} (if the uploader and creator releases the rights),
• {{PD-user|user}} (if another user released his/her rights), or {{Copyrighted free use}}.
  • use {{PD-user-w|projectcode|projectname|username}} for users with no account on Commons.
• {{PD-author|Author's name}} - for works released into the public domain by non-Wikimedia users.
• If the work is PD for another reason, check the copyright tag page or use {{PD-because|reason}}.