anchor.diff:  
   ###<a id='subdomain-app'></a>Configuring Your Application to Use a Private or Shared Subdomain ###
   
  -You can modify your application domain by mapping subdomains to the domain. Each added subdomain is the child to its following parent domain. The subdomains must meet the following requirements:
  +You can create a new domain by mapping subdomains to an existing domain. Each added subdomain is the child to its following parent domain. The subdomains must meet the following requirements:
   
   * **Private Subdomains**:
   	* You can map a private subdomain to a private parent domain only if the domains belong to the same org.
  
positive.code: 	</tr>
  </table>
  
  If your DNS provider does not support ANAME or ALIAS records use subdomain redirection, a technique also known as **domain forwarding**, to add a root domain. If you use this method, note that SSL requests to the root domain result in an error because the SSL certificate generally only matches the subdomain.
  
  Configure the redirect from the root domain to the target "www" subdomain, and configure the "www" subdomain as a CNAME record reference to the target app URL. The table below illustrates this pattern.
  
  
negative.code: 
  ###<a id='parent-app'></a>Configuring Your Application to Use a Private or Shared Parent Domain ###
  
  Parent domains must meet the following requirements:
  
  * **Private Parent Domains**: You can only create a private domain that is parent to a private subdomain.
  
  