Development of Creative Commons licenses

[Daniel Carrera <daniel.carrera AT zmsl.com>]

drew Roberts wrote:
> The "Invariant Sections" - how do these affect the remix culture?

Yes, I just remembered those. Invariant sections seems closer to BY-ND 
than BY-SA. It looks like the GFDL is like having a work with portions 
that are BY-SA and portions that are BY-ND.

Here's an idea for making them compatible:

* BY-SA works can be relicensed as GFDL with no invariant sections.
* BY-ND works can be relicensed as GFDL as one big invariant section.
* GFDL work can be relicensed as BY-SA if they have no inv. section.
* GFDL work can be relicensed as BY-ND if they have any inv. section.
* GFDL work can be relicensed where the inv. section is BY-ND and the 
rest is BY-SA.

One concern:
Would it be possible to take a BY-SA work, make it GFDL, add an 
invariant section, and then make it BY-ND? It looks like it. The GFDL 
could open a path for removing the ShareAlike clause from a work. We 
must not allow that.

Cheers,
Daniel.
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