Question about vrm / vrmlist elements

Hi, The vrm (version / release / modification) element has three attributes: version, release, and modification.
The teams I've worked with always used only a single number in each; version 1.5.3 would be <vrm version="1" release="5" modification="3"/> and processing would render that appropriately.
Questions in the review came up like: What if I have a version number "1.5.4.2.3", but I'm limited to the three attributes?
What would break if I have <vrm version="1.5.4.2.3"/>?
I have some thoughts on this but wanted to send the quick note to get it on our TC agenda for discussion.
Thanks, Robert