5.9.2 The (non-)relation between the Daisy repository and the URL space
The Daisy repository is a flat (non-hierarchical) document-store. It isn't necessarily web-related, and hence doesn't define, dictate or influence how documents are actually published on the web, including how these documents will map to the URL space.
Recall that documents in the repository are identified by a unique, numeric ID. The uniqueness is within one repository, it is a sequence number starting at 1, not a global unique identifier.