The following picture shows the process to establish stable interdomain Web links by a URL example:

Only the Site ID is registerd on the resolver (1). The second ID is used as an argument for the concatenated URL it delivers on a Web request (2). The target system "" can find the resource by using both IDs.

In this case also the final resource is given a UID. Thus it might be possible to find the addressing document by an Internet search engine or in dedicated directories, if the document migrates to a different container. At minimum one known resolving domain is necessary. These lookup domains can also be organized in a federated way.

In the meantime the resolved target URL of the picture was changed, but without impact to all clients using URLs.

Currently, in draft status all unknown site links are resolved to this page.