User-agent: Googlebot
User-agent: YandexBot
User-agent: RamblerBot

Disallow: /data/
Disallow: /database/
Disallow: /drupal/
Disallow: /files/
Disallow: /includes/
Disallow: /misc/
Disallow: /modules/
Disallow: /scripts/
Disallow: /sites/
Disallow: /themes/
Disallow: /admin
Disallow: /user
Disallow: /node
Disallow: /tracker