[tz] Version in zoneinfo files?

My understanding is that while the release version e.g. 2014i, etc, is in the tzdata makefile, the binary output by zoneinfo does not have any sort of metadata included. Is this accurate? Is there any way to tell from the zoneinfo output what version was used to generate it? If not, I would like to suggest that a VERSION or METADATA file be added to the zoneinfo output. Otherwise you end up having to bundle your own metadata file along with the zoneinfo (which means that two applications that both consume zic output may each have to bundle their own binary, which can cause problems as two applications with different release cycles go out of sync from one another).