Why don all LID URLs hosted by the same service provider have the same format?
(suggested by Dave Kearns, updated answer) Our goal with LID is to have only one URL for the person (or the persona). This means that using an existing URL of the user (e.g. their blog URL) as their LID URL is a fundamentally simpler setup than coming up with an additional URL construction scheme. Further, reusing the same URL provides the abstraction that we want to provide: there is one URL for a person, and depending on which arguments you provide (some, none, e.g. xpath=…) it returns different information.
