- From: Alan Ruttenberg <alanruttenberg@gmail.com>
- Date: Thu, 5 Mar 2009 23:22:43 +0900
- 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 >>http://lists.w3.org/Archives/Public/public-owl- >>comments/2009Mar/0014.html > > [...] > >>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 about. 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. -Alan > > 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) > Tel : +49-721-9654-726 > Fax : +49-721-9654-727 > Email: michael.schneider@fzi.de > WWW : http://www.fzi.de/michael.schneider > ======================================================================= > FZI Forschungszentrum Informatik an der Universität Karlsruhe > Haid-und-Neu-Str. 10-14, D-76131 Karlsruhe > Tel.: +49-721-9654-0, Fax: +49-721-9654-959 > Stiftung des bürgerlichen Rechts, Az 14-0563.1, RP Karlsruhe > Vorstand: Prof. Dr.-Ing. Rüdiger Dillmann, Dipl. Wi.-Ing. Michael Flor, > Prof. Dr. Dr. h.c. Wolffried Stucky, Prof. Dr. Rudi Studer > Vorsitzender des Kuratoriums: Ministerialdirigent Günther Leßnerkraus > ======================================================================= > >
Received on Thursday, 5 March 2009 14:23:22 UTC