extern type ip;
{{An IP address}}
+extern type your_ip;
+extern val your_ip_to_ip : your_ip -> ip;
+{{An IP address that you're authorized to use; e.g., for an SSL web host}}
+
extern type host;
{{A hostname; that is, (more or less) an alphanumeric string}}
extern type mail_node;
{{A node offering SMTP services}}
-extern val mail_node_to_node : mail_node -> node;
\ No newline at end of file
+extern val mail_node_to_node : mail_node -> node;
+
+extern val domainHost : host -> [Domain] {} => { Hostname : domain };
+{{Appends the current domain onto a host.}}