[anyfoo]

As a member of such a region, I suspect that those regions a well aware that the prevalent notation throughout programming uses '.' as a decimal separator. IPv4 addresses usually have 4 components and do not have an inherently fractional unit as their first component.

[mijamo]

Disagree. '.' is used for version numbers everywhere, even when it's only 2 components (ex: Wordpress versioning, Django etc.) and it seems pretty clear that 1.11 > 1.2 there.

Once the specification is stated clearly as it is right now it is not a problem.

Another symbol could be used (for instance #) but I really don't see a need for that.