If a resource needs to be created with content from any given URL, the following line of code can be used to add a resource from a given URL to a suggested location. The real location to which the resource was added is returned. The template_resource should contain metadata of the resource that a user wants to add.
String real_location = registry.importResource("c1/c2/r3", "http://wso2.com", template_resource);
metadata of the resource is defined as the properties of the resource, media type of the resource, author of the resource, create date of the resource, last updates time of the resource, etc.