Referential Containment
An external member resource (symbolic link) is referentially contained by the collection
- server does not maintain the containment relationship between the collection and the member
- if the member is deleted or moved, the collection typically does not get updated
- if the moved/deleted resource and collections containing it as an external member are on the same server, an intelligent server could update collections it controls
- in the general case where the moved/deleted resource and the collection are on different servers, nothing can be done without a server-to-server protocol (out of scope for WebDAV)