Ok, here it is
 
If you just want to ignore a single pattern, it’s easy
 
Svn propset svn:ignore VALUE TARGET
 
e.g.

svn propset svn:ignore uploads .

(if you are in the media directory for example)

 
If you have a list of things to ignore, you need to give it a newline separated list of values in a file
 
Svn propset svn:ignore –F filename TARGET
 
david