YPL 1.1
YAHOO! PUBLIC LICENSE v1.1
Commercial Use (Describes the ability to use the software for commercial purposes.)
Modify (Describes the ability to modify the software and create derivatives.)
Distribute (Describes the ability to distribute original or modified (derivative) works.)
Sublicense (Describes the ability for you to grant/extend a license to the software.)
can do
Use Trademark (Describes the allowance of using contributors' names, trademarks or logos.)
Hold Liable (Describes the warranty and if the software/license owner can be charged for damages.)
can NOT do
Include Copyright (Describes whether the original copyright must be retained.)
Include License (Including the full text of license in modified software.)
Disclose Source (Describes whether you must disclose your source code when you distribute the software.)