at having a look at : /etc/e-smith/templates/etc/httpd/conf/httpd.conf/VirtualHosts/28SubversionContent
you will see that it uses the accounts db
this way should do the trick: (just adapt and choose the appropriate options for you. Bold are for default option if you do not create the property in the db.
db accounts set SVNREPONAME repository AccessType {local,private,global} AuthentificationRequired {yes,no} ForceSSL {yes,no} SVNAutoVersioning {on, off} ModMimeUsePathInfo {on, off} AllowOverride {None,....} GroupsRead list,of,groups UsersRead list,of,users GroupsWrite list,of,groups UsersWrite list,of,users
then
signal-event repository-create