Username should start with letter, end with either letter or number and consist of letters, numbers, '_' and '.' chars. Length is 2-20 chars.
Password may contain any chars and may be of any length.
E-mail is used to send you registration information and should be correct.
SVN username is the login name you'd like to use to make commits to SVN. Rules applied are the same as for username.
Reason is used to decide if you really need the account and should be descriptive. Length is 20-500 chars.
What is Subversion (SVN)?
How to work with SVN
Making changes to kernel
Site registration
This page is for people who need Subversion account. Do you? Well, you don't if you're not going to commit changes to the server. The only situation you'll need this form in is when you don't have the account yet but you already have some changes made to the code (programs, drivers, kernel) you think or know for sure others will find useful. Please don't disturb us with foolish requests. If you only need to create a site account, there's another page for this case.
So if you do, fill in the form and get your account in several hours or maybe even minutes. Just remember that all fields are required.