Definitions

1. checkout: Gets a copy of the code on google and copies it to your PC
2. commit: Puts your changes back to google code

Instructions

1. Download and install an SVN client. For Ubuntu users, try

sudo apt-get install rapidsvn 

2. If you are behind a proxy, configure rapidsvn accordingly. Venu Gopal wrote a nice tutorial for Linux users.
3. Download and install Java Development Kit (JDK) 6.0 or higher
4. Download and install Netbeans 6.0
5. Launch Netbeans and at the top, click Versioning >> Checkout
6. Enter the following:

URL: http://documentdatabase.googlecode.com/svn/trunk/
User: (leave blank)
Password: (leave blank)

7. Check the proxy settings by clicking the Proxy Configuration button. Hit next.
8. Leave all blank, except Local Folder, which should reflect a safe place to keep the code on your PC
9. Click Scan for Netbeans Projects after Checkout, which will allow Netbeans to open the project after its been downloaded.
10. Wait a while for the project to download.
11. Explore the project! Latest Javadocs can be created by right clicking the project in the Projects panel, and clicking Generate Javadoc

-Tres