- From: Aldo Bucchi <aldo.bucchi@gmail.com>
- Date: Mon, 29 Sep 2008 16:34:25 -0300
- To: "Dan Brickley" <danbri@danbri.org>
- Cc: public-lod@w3.org
On Mon, Sep 29, 2008 at 2:08 PM, Dan Brickley <danbri@danbri.org> wrote: > > Damian Steer wrote: >> >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> [sorry, forgot to reply-all] >> >> Peter Ansell wrote: >> >> | That is fine for classes, but how do you map individuals without >> metadata side-effects? >> >> Looking at my previous answer again I think I should take another run at >> this :-) >> >> One way of thinking about equivalence is in terms of substitution: if :x >> :equiv :y when is it safe to substitute :x with :y? >> >> The default is: it's not safe (obviously). >> >> :x equivalentClass :y -> safe when used as a class (e.g. rdf:type :x) >> :x sameAs :y -> always safe (watch out!) >> :x sameConceptAs :y -> safe in subject positions > > do you mean subject in the 'topic, dc:subject' sense, rather than > subject/predicate/object sense? On first reading I thought you meant the > latter, which would be problematic since any inverse of property can flip > values into 'object' role. So assuming the former, I quite agree. > > Also thanks for expanding on what I meant. I was indeed picking a strong > example to emphasise my (under articulated) case. Using an owl:sameAs claim > between independently developed classes and properties is almost always > misleading, confusing and untrue. So yup I agree that application-specific > properties such as these are often more useful. > > Also btw folks there is no such thing as dc:author. It was changed in the > mid-late 1990s to be dc:creator, so as to better cover non-written creations > such as images, museum artifacts etc. So best to avoid/fix it in mail > threads before 'dc:author' ends up getting mentioned in books etc. Oops. Made a quick search and I don't use author anywhere in my codebase ( I use creator ). But for some reason it is still sticking in my mind ( band, music, author ) If it shows up in a book I'll feel really guilty, as the material "author" of that crime ( or should I say creator )... This brings up another point ( re. retroactive edition ). Why haven't we found a replacement for mailing lists? Dog fooding anyone? ( rhetoric question perhaps. don't reply on this thread or it will go seriously off topic ). Thx, A > > cheers, > > Dan >> >> :x sameWorkAs :y -> safe for author, creation date >> :x sameManifestationAs :y -> safe for the the above, and length (?) >> >> Does that help? >> >> Damian >> >> -----BEGIN PGP SIGNATURE----- >> Version: GnuPG v1.4.6 (GNU/Linux) >> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org >> >> iD8DBQFI4NdRAyLCB+mTtykRAppqAJ9kzkWgcWt0zeWfWdMfWwqtdhoblwCeNCWH >> 54J20+PaNd1xmCmcFLs9DN8= >> =/gW2 >> -----END PGP SIGNATURE----- >> >> > > > -- :::: Aldo Bucchi :::: +56 9 7623 8653 skype:aldo.bucchi twitter:aldonline http://aldobucchi.com/ http://univrz.com/
Received on Monday, 29 September 2008 19:35:03 UTC