version omitted

[Alex Buckley]

Mark Reinhold wrote:
> It would be interesting to look at what other module(-like) systems do
> in this case.

In OSGi, a version (such as of a bundle or a dependency) has a default 
value of 0.0.0. Therefore, any manifest header that can express a 
version, does express a version, even if it does not denote that 
version. Versionable entities can always have their versions compared.

Similarly, the default version range for headers that use them (such as 
Import-Package) is [0.0.0,infinity).

Alex