On 1/19/06, Pollard, Mike <[EMAIL PROTECTED]> wrote: > Martijn van Oosterhout wrote: > > > Please provides natural keys for any of the following: > > > > - A Person > > - A phone call: (from,to,date,time,duration) is not enough > > - A physical address > > - A phone line: (phone numbers arn't unique over time) > > - An internet account: (usernames not unique over time either) > > Ahh, a challenge. Hmm, not sure about all of them, but here goes: > > A Person - well, you could use a bit map of their fingerprints, or maybe > their retinal scan. Of course, that could change due to serious injury. > Maybe some kind of representation of their DNA?
Unless the person in question happens to be a chimera (yes, they do exist). ;-) -- Mike Rylander [EMAIL PROTECTED] GPLS -- PINES Development Database Developer http://open-ils.org ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
