Provide indication to user of the state of completeness of guide
All versions < 1 are in the development, all version >1 are complete.
Use a three number system where first indicates new versions, second major changes and third minor changes. e.g.
1.1.1 -- first version of the document (the document describe topic x, in the future it may also cover x and y which would lead to a version change), one major change (new section) and one minor change (table fixtures, grammar mistakes.)
Will inevitably be subjective, but better than nothing.