http://rtfm.modx.com/display/revolution20/Using+Friendly+URLs
# For full documentation and other suggested options, please see
# http://svn.modxcms.com/docs/display/MODx096/Friendly+URL+Solutions
# including for unexpected logouts in multi-server/cloud environments
# and especially for the first three commented out rules
# Friendly URLs Part
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} .
# Force all pages to go to www.domain.com for SEO
RewriteCond %{HTTP_HOST} !^www\.mydomain\.com [NC]
RewriteRule (.*) http://www.mydomain.com/$1 [R=301,L]
# Friendly URLs
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
# Additional Settings Follow
ExpiresActive On
ExpiresByType image/gif A2592000
ExpiresByType image/jpeg A2592000
ExpiresByType image/png A2592000
BrowserMatch "MSIE" brokenvary=1
BrowserMatch "Mozilla/4.[0-9]{2}" brokenvary=1
BrowserMatch "Opera" !brokenvary
SetEnvIf brokenvary 1 force-no-vary