Is there a website, for example, the name of the company.of the Russian Federation.
It is now planned to divide the site into regions that each had their own phone and subdomain.
For each subdomain will be a city.company.Russia, its own site map and your robots.
Want using common "stuffing" of the engine, to divide the rest of the files.
That is, that all the necessary files for the website were taken from a shared folder.
And Sitemaps and robots each had a separate?
PS: Found the first solution for robots https://drupal.ru/node/46111