The OWL is only designed to be compatible with free open-source licenses. This graph shows how a license is chosen to be either OWL-compatible or not.
graph TD
B[License is PD] --> C[Yes]
C --> D[Compatible with the OWL]
Q --> Yes --> D
B --> X[No] --> Q[License provides permissions to modify and distribute for any purpose - including commercially]
Q --> X2[No]
X2 --> E[Incompatible with the OWL - proprietary]
This graph is completely made with Mermaid, a graph renderer. The source code of this document contains the graph code. It can help you with Mermaid graphing ;)