Syntax for crossdomain.xml

<?xml version=“1.0”?><!DOCTYPE cross-domain-policy SYSTEM “<A href=“http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd"><cross-domain-policy><allow-access-from">http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd”><cross-domain-policy><allow-access-from domain=”*.guilda.com" /></cross-domain-policy>

Would the first url in bold be your root / domain…

And the .guilda.com be the sub-domain?