[wolverine876]

What about material not in the SRD?

Read analyses by IP attorneys. OGL 1.0a restricts rights; people have more rights if they just ignore it and don't use it. Here's one from the EFF:

https://www.eff.org/deeplinks/2023/01/beware-gifts-dragons-h...

[notpushkin]

> Copyright grants an author a limited monopoly over their creative expression. It doesn’t cover bare facts, mere ideas, systems, or methods.

Does this mean most software is uncopyrightable?

[tga_d]

Software is an expression of something (an algorithm, layout, etc.). So yes, you can copyright it. What you can't copyright is the underlying principles; e.g., the implementation of Google's search engine is protected by copyright, but the notion of a search engine or page rank is not. If someone wants IP restrictions for that, they need a patent, which has its own set of constraints on what is and is not allowed.

Edit to add: this is also why implementations of software from reverse engineering, like ReactOS, are perfectly legal, so long as they don't copy the actual implementation.

[wolverine876]

I don't understand? I assume you know that software can be subject to IP. I don't see anyone say otherwise, except you.