Ebooks Stack Exchange is a question and answer site for ebook publishers and readers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have seen various e-books on the Internet that have a (v5.0) in the name e.g.

Charles Darwin - On the Origin of Species (v5.0).epub

Initially I thought this had to with the version 5 of the DocBook, but I have seen other versions (v3.4) that do not have a corresponding DocBook version. I have also seen this for e-books in .html and .txt files. Nothing in the those or the .epub file points at DocBook in any way.

What does this (v5.0) stand for?

share|improve this question
up vote 7 down vote accepted

This is an indication of the quality of the ebook. (v5.0) should be close to retail quality:

v1.x: publication has been scanned and OCR-ed, but not spell checked.
v2.x: publication has been scanned, OCR-ed, and spell checked but not proofread.
v3.x: publication has been scanned, OCR-ed, spell checked, and proofread.
V4.x: publication has been proofread by multiple persons and is near retail quality.
v5.x: publication is of retail quality.

Minor version numbers are normally used for committed/uploaded changes.

I have not come across any (semi-)official website for these indications. I pulled these from my notes that I made while doing book scans myself. I think they came from some Usenet post.

Some v5 material still has a lot of errors (especially older publications where the fonts are not easily recognised by the OCR).

share|improve this answer
surely just means it is the 5th release – Mark Mar 5 '14 at 16:14
@Mark Not for the Major number. For the minor version number, you could see that as a release. It seems to be mostly used when multiple people make cooperative reviews – Anthon Mar 5 '14 at 16:17

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.