[development] Taxonomy: Multiple parents?
sime
info at urbits.com
Tue Jul 24 11:56:39 UTC 2007
From reporting/analysis point of view, salmon IS salmon.
.s
Gerhard Killesreiter wrote:
>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1
>
>Robert Douglass schrieb:
>
>
>>In my opinion, any time multiple parents are used it is a mistake in the
>>data model. For example, if you have regional offices and each office
>>has a sale, customer and advertising contact person, you might be
>>tempted to model the data like this:
>>
>>
>
>How about:
>
>Fish living in:
>
>- - salt water
>. shark
>. salmon
>. eel
>. cod
>
>- - fresh water
>. trout
>. salmon
>. eel
>. carp
>
>Cheers,
> Gerhard
>-----BEGIN PGP SIGNATURE-----
>Version: GnuPG v1.4.6 (GNU/Linux)
>
>iD8DBQFGpeNafg6TFvELooQRArsHAJ9ZLyyMKxIUW25OBZFi43CQ+T5MIwCfTNxu
>Yhbq6xb9JMsB7XgH+HcUl48=
>=Xezr
>-----END PGP SIGNATURE-----
>
>
>
>
More information about the development
mailing list