|
TAPR OHL (v.1.0) |
CERN OHL (v.1.2) |
CERN OHL-S (v.2.0) |
CERN OHL-W (v.2.0) |
CERN OHL-P (v.2.0) |
TDPL (v. 1.2) |
Solderpad (v. 2.0) |
| Allows proprietary derivatives |
No |
No |
No |
No |
Yes |
No |
Yes |
| Allows unmodified redistribution |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Allows combination with proprietary designs |
No? |
No? |
No |
Yes |
Yes |
No? |
Yes |
| Allows redistribution under a different licence |
No |
No |
No |
No |
Yes |
No |
Yes |
| Allows changing the text of the licence |
No |
No |
No |
No |
No |
No |
Yes |
| Requires notifying changes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Requires providing the location for the documentation |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
| Requires providing a copy of the licence |
Yes |
Yes |
Recommended |
Recommended |
Recommended, required if redistributing under a different licence |
Yes |
Yes |
| Requires contacting upstream licensor when distributing modified documentation |
Best effort attempt |
No |
No |
No |
No |
No |
No |
| Requires contacting the upstream licensor when producing and distributing products |
Best effort attempt |
Optional |
No |
No |
No |
No |
No |
| Requires including the old files with the new, modified files in the documentation |
Yes |
No |
No |
No |
No |
No |
No |
| Requires copyright notice to be kept in documentation files |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Requires Notices to be accessible to those who receive products |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No? |
| Grants non-exclusive patent licence |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Extends patent litigation immunity to owners of OH-based products |
Yes |
No |
No |
No |
No |
Yes |
No |
| Includes patent retaliation clause in event of litigation |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
| Includes grace period for bringing the infringing party into compliance |
No |
No |
Yes |
Yes |
N/A |
No |
No |
| Grants trademark licence |
No |
No |
No |
No |
No |
No |
No |
| Provides no warranty or guarantee of fitness for any use or purpose |
Yes, but with one exception |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |