Versioning your software

[sde]

I'm working on a project which is going to be growing for a while.

I need to start setting version numbers on the .dlls I make.

What is the standard way of numbering versions?

Is there really a formal standard?

ie. v 0.1 or 0.1.21

i don't understand.

[Epsilon]

The way I've always seen it done is you increment based on what has changed.

Let's say you start with 0.1
If you just make some bug fixes you would go to 0.1.1
More bug fixes, go to 0.1.2
Add new functionality, go to 0.2
Add some new features, go to 0.3
Do more bug fixes, go to 0.3.1
Substantially re-write the whole thing, go to 1.0

That's been my experience, but I'm not sure if there are any hard rules about it.

[Belisarius]

The industry standard is to be a full point ahead of the competition.