first, last, previous, next

• ErrorWarning if any of these occur in an entry
• Warning if any exist without all the others ?
• Exception: if first==self, nextprevious must be omitted
• Exception: if last==self, previousnext must be omitted
• Error if fh:complete is also present

prev-archive, next-archive

• ErrorWarning if any of these occur within an entry
• Error if fh:complete is also present
• Warning if any exist and current does not exist
• Warning if fh:archive is not also present

• ErrorWarning if this occurs within an entry
• Warning if fh:archive is not also present
• Warning if fh:complete is present, and current link doesn't match self

• Error if this occurs within an entry
• Warning if current link is not present
• Warning if at least one of prev-archive, next-archive, or fh:complete does not exist

• Error if this occurs within an entry
• Warning if current link is not present ?