摘要

協議

I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

This image was created as a replacement for File:Portal icon.svg. However, it is not a derivative work, as it was created entirely from scratch. The only elements that it shares with File:Portal icon.svg (horizontal blue puzzle piece with keyhole) are so simple that they are not protectible by copyright. Whatever minor creative features that are copyrightable in File:Portal icon.svg are done quite differently in this version.