User-agent: Twitterbot
Allow: /downloads
Allow: /catalog
Allow: /catalog?page*
Disallow: /catalog?*
Disallow: /catalog/*
Disallow: /contact
Disallow: /users

User-agent: *
Allow: /catalog
Allow: /catalog?page*
Disallow: /catalog?*
Disallow: /catalog/*
Disallow: /contact
Disallow: /downloads
Disallow: /users