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Re: unhappy responses

From: Alan Ruttenberg <alanruttenberg@gmail.com>
Date: Thu, 5 Mar 2009 23:22:43 +0900
Message-ID: <29af5e2d0903050622j7cbf0376i32429e38a2b4245e@mail.gmail.com>
To: Michael Schneider <schneid@fzi.de>
Cc: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com>, public-owl-wg@w3.org
On Thu, Mar 5, 2009 at 7:59 PM, Michael Schneider <schneid@fzi.de> wrote:
>>-----Original Message-----
>>From: public-owl-wg-request@w3.org [mailto:public-owl-wg-request@w3.org]
>>On Behalf Of Peter F. Patel-Schneider
>>Sent: Thursday, March 05, 2009 11:35 AM
>>To: public-owl-wg@w3.org
>>Subject: unhappy responses
>>I see two less-than-minimally-happy responses so far.
>>47, from Marijke Keet
> [...]
>>Marijke appears to be confused about keys.
> Maybe this pointer will be sufficient to resolve her confusion:
>  <http://en.wikipedia.org/wiki/Alternate_key>

It is different to say that there can be more than one key property,
than to say for any given key property a single individual can have
more than one value. It is the latter she seems to be complaining

I can see her having a question about this. For instance the top
google hit for database keys
http://databases.about.com/cs/administration/g/key.htm says:

>Definition: A database key is a attribute utilized to sort and/or identify data in some manner. Each table has a primary key which uniquely identifies records. Foriegn keys are utilized to cross-reference data between relational tables.

If the key is not functional then the sort order may not be well defined.

I think she would have a better argument about our nomenclature being
confusing if she could cite authoritative sources that define key
properties as functional. Unless someone objects I will follow up with
her along these lines off list.


> Or, alternatively, some pointer to an arbitrary textbook on the basics of
> relational databases.
> Michael
> --
> Dipl.-Inform. Michael Schneider
> Research Scientist, Dept. Information Process Engineering (IPE)
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Received on Thursday, 5 March 2009 14:23:22 UTC

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