[svn] What is trunk, branch and tag in Subversion?

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What do “branch”, “tag” and “trunk” really mean?

What is a trunk, branch and tag in Subversion and what are the best practices to use them?

What tools can I use for Subversion in Visual Studio 2008?

A trunk is considered your main code base, a branch offshoot of the trunk. Like, you create a branch if you want to implement a new feature, but don't want to affect the main trunk.

TortoiseSVN has good documentation, and a great diff tool.

I use Visual studio, and I use VisualSVN and TortoiseSVN.

The "trunk", "branches", and "tags" directories are conventions in Subversion. Subversion does not require you to have these directories nor assign special meaning to them. However, this convention is very common and, unless you have a really good reason, you should follow the convention. The book links that other readers have given describe the convention and how to use it.

If you're new to Subversion you may want to check out this post on SmashingMagazine.com, appropriately titled Ultimate Round-Up for Version Control with SubVersion.

It covers getting started with SubVersion with links to tutorials, reference materials, & book suggestions.

It covers tools (many are compatible windows), and it mentions AnkhSVN as a Visual Studio compatible plugin. The comments also mention VisualSVN as an alternative.

A good book on Subversion is Pragmatic Version Control using Subversion where your question is explained, and it gives a lot more information.

A great place to start learning about Subversion is http://svnbook.red-bean.com/.

As far as Visual Studio tools are concerned, I like AnkhSVN, but I haven't tried the VisualSVN plugin yet.

VisualSVN does rely on TortoiseSVN, but TortoiseSVN is also a nice complement to Ankh IMHO.

The answer by David Schmitt sums things up very well, but I think it is important to note that, to SVN, the terms 'branch', 'tag', and 'trunk' don't mean anything. These terms are purely semantic and only affect the way we, as users of the system, treat those directories. One could easily name them 'main', 'test', and 'releases.'; As long as everyone using the system understands how to use each section properly, it really doesn't matter what they're called.

To use Subversion in Visual Studio 2008, install TortoiseSVN and AnkhSVN.

TortoiseSVN is a really easy to use Revision control / version control / source control software for Windows. Since it's not an integration for a specific IDE you can use it with whatever development tools you like. TortoiseSVN is free to use. You don't need to get a loan or pay a full years salary to use it.

AnkhSVN is a Subversion SourceControl Provider for Visual Studio. The software allows you to perform the most common version control operations directly from inside the Microsoft Visual Studio IDE. With AnkhSVN you no longer need to leave your IDE to perform tasks like viewing the status of your source code, updating your Subversion working copy and committing changes. You can even browse your repository and you can plug-in your favorite diff tool.

A fantastic free utility to use if you have a team of developers is SVN Monitor. It serves as a heartbeat for your tree, telling you when there are updates, possible conflicts, etc. It's not quite as useful for a solo developer though.