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 # crossdomain.xml
 
 A cross-domain policy file is an XML document that grants a web client—such as
 Adobe Flash Player, Adobe Reader, etc., permission to handle data across
 multiple domains. When a client hosts content from a particular source domain
 and that content makes requests directed towards a domain other than its own,
 the remote domain would need to host a cross-domain policy file that grants
 access to the source domain, allowing the client to continue with the
 transaction. Policy files grant read access to data, permit a client to include
 custom headers in cross-domain requests, and are also used with sockets to
 grant permissions for socket-based connections.
 
 For full details, check out Adobe's article about the [cross-domain policy file
 specification](http://www.adobe.com/devnet/articles/crossdomain_policy_file_spec.html).