Sitemap for a site with a large number of dynamic subdomains

Question

I\'m running a site which allows users to create subdomains. I\'d like to submit these user subdomains to search engines via sitemaps. However, according to the sitemaps protoco

Answer 1

Yes, the subdomain restriction is in the sitemaps.org spec, but, Google has put some exceptions in place:

1. Verify all subdomains within your Google Webmaster tools account http://www.google.com/support/webmasters/bin/answer.py?answer=75712 cross-submission of sitemaps XML via Google Webmaster tools - if submitted via the root of your domain - will not throw errors for Google

2. Within the robots.txt of a subdomain you can point to sitemaps XML on other domains. there will be no cross submission errors - for Google