chris, I would set it up a bit differently (in order to avoid hardwiring
defaults): write a labelLens that applies to everything and produces
(in preference order) value of rdfs:label of object, or dc:title of object,
or uri of object. Then make sure that lens has lowest priority/gets overridden
by any more specific lens for the object.
From general-return-352-karger=csail.mit.edu_at_simile.mit.edu Tue Mar 22 10:30:59 2005
Mailing-List: contact general-help_at_simile.mit.edu; run by ezmlm
X-No-Archive: yes
Reply-To: <general_at_simile.mit.edu>
X-Authenticated: #1074481
From: "Chris Bizer" <bizer_at_gmx.de>
To: <general_at_simile.mit.edu>
Subject: Re: toString and fresnel
Date: Tue, 22 Mar 2005 10:30:46 -0500
X-Y-GMX-Trusted: 0
This is a multi-part message in MIME format.
------=_NextPart_000_0048_01C52ECA.354939B0
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Hi Eric and all,
We are having the concept of labelLenses in Fresnel for handling this =
case.
Quote from the Fresnel manual I'm currently writing:
http://simile.mit.edu/repository/fresnel/trunk/docs/manual/FresnelVocabul=
ary.htm
A :labelLens provides a short human-understandable label for an instance =
of a specific class. Browser in the need of labelling a instance (see =
fresnel:label in the core style vocabulary) should implement the =
following behaviour:
1. Look for a labelLens for the specific class.
2. If no label lens is found, display rdfs:label value.
3. If no rdfs:label is found, display dc:title value.
4. If no dc:title is found, display the URI of the resource.
Example: LabelLens for the class foaf:Person specifying that the =
person's name should be used as label:=20
:foafPersonLabelLens rdf:type fresnel:ClassLens ;
fresnel:purpose fresnel:labelLens ;
fresnel:lensDomain foaf:Person ;
fresnel:showProperties foaf:name .
Chris
----- Original Message -----=20
From: "Eric Miller" <em_at_w3.org>
To: <general_at_simile.mit.edu>
Sent: Tuesday, March 22, 2005 9:50 AM
Subject: Re: toString and fresnel
>=20
> On Mar 22, 2005, at 9:30 AM, David R. Karger wrote:
>=20
> > please be more precise about in-your-face urls?
>=20
> http://www.w3.org/2001/sw/ is an in-your-face url.
>=20
> > i am sure fresnel shows rdfs:label if it exists; question is what
> > to do if there is none.
>=20
> Exactly.
>=20
> Implementing variants of this problem in the past (and generalizing=20
> from various other implementations), the general approach seems to be=20
> hard-wired in code to look for (rdf:value, rdfs:label, dc:title) and=20
> then punt to an in-your-face url of the 'thing'. I'm hoping we can do=20
> better than that. :)
>=20
> Haystack seems to have gotten this pretty close. How is this being =
done?
>=20
> As Emmanuel mentioned -
>=20
> "... fresnel:label (or at least there is label in it, Chris or Ryan=20
> will know better) and takes a URI reference (indicating a property) as =
> the property value to be considered as the label."
>=20
> seems to be a start towards this.
>=20
> There are various issues to watch out for with objects that are=20
> multiple types (which in turn might have multiple fresnel:label (s) =
but=20
> thats a different thread.
>=20
> I just wanted to make sure this feature was in there somewhere. :)
>=20
> > Perhaps rather then showing url, fresnel
> > should print "unnamed <rdfs:Class of resource>"
>=20
> Yes. In the case of not knowing the 'label', applications should=20
> defaulting to some sort of additional helpful display. While this=20
> default will be application specific in the case of Longwell /=20
> PiggyBank / SemBank a linked version of the above is preferable to=20
> 'anonymous'.
>=20
> --
> eric miller http://www.w3.org/people/em/
> semantic web activity lead http://www.w3.org/2001/sw/
> w3c world wide web consortium http://www.w3.org/
>=20
>=20
>=20
>=20
> > From general-return-345-karger=3Dcsail.mit.edu_at_simile.mit.edu Tue =
Mar=20
> > 22 09:23:55 2005
> > Mailing-List: contact general-help_at_simile.mit.edu; run by ezmlm
> > X-No-Archive: yes
> > Reply-To: <general_at_simile.mit.edu>
> > To: general_at_simile.mit.edu
> > From: Eric Miller <em_at_w3.org>
> > Subject: toString and fresnel
> > Date: Tue, 22 Mar 2005 09:23:52 -0500
> >
> > In your face URLs are a "bad thing".
> >
> > One of the uses I see of fresnel is being able to declaratively
> > indicate human readable "default" labels for arbitrary resources. I
> > suspect this is part of fresnel but I haven't seen this discussed =
yet.
> > Can one of the fresnel folk confirm how this is currently handled?
> >
> > I just want to make sure we don't miss the simple use cases while
> > dealing with the harder ones.
> >
> > --
> > eric miller =
http://www.w3.org/people/em/
> > semantic web activity lead http://www.w3.org/2001/sw/
> > w3c world wide web consortium http://www.w3.org/
> >
> >
>
------=_NextPart_000_0048_01C52ECA.354939B0
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2800.1479" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Hi Eric and all,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>We are having the concept of =
labelLenses in=20
Fresnel for handling this case.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Quote from the Fresnel manual I'm =
currently=20
writing:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2><A=20
href=3D"
http://simile.mit.edu/repository/fresnel/trunk/docs/manual/Fresne=
lVocabulary.htm">
http://simile.mit.edu/repository/fresnel/trunk/docs/manu=
al/FresnelVocabulary.htm</A></FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>A :labelLens provides a short =
human-understandable=20
label for an instance of a specific class. Browser in the need of =
labelling a=20
instance (see fresnel:label in the core style vocabulary) should =
implement the=20
following behaviour:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>1. Look for a labelLens for the =
specific=20
class.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>2. If no label lens is found, display =
rdfs:label=20
value.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>3. If no rdfs:label is found, display =
dc:title=20
value.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>4. If no dc:title is found, display the =
URI of the=20
resource.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Example: LabelLens for the class =
foaf:Person=20
specifying that the person's name should be used as label: =
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>:foafPersonLabelLens rdf:type =
fresnel:ClassLens=20
;<BR> &n=
bsp; =20
fresnel:purpose fresnel:labelLens=20
;<BR> &n=
bsp; =20
fresnel:lensDomain foaf:Person=20
;<BR> &n=
bsp; =20
fresnel:showProperties foaf:name .</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Chris</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>----- Original Message ----- </FONT>
<DIV><FONT face=3DArial size=3D2>From: "Eric Miller" <</FONT><A=20
href=3D"mailto:em_at_w3.org"><FONT face=3DArial =
size=3D2>em_at_w3.org</FONT></A><FONT=20
face=3DArial size=3D2>></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>To: <</FONT><A=20
href=3D"mailto:general_at_simile.mit.edu"><FONT face=3DArial=20
size=3D2>general_at_simile.mit.edu</FONT></A><FONT face=3DArial=20
size=3D2>></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Sent: Tuesday, March 22, 2005 9:50 =
AM</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Subject: Re: toString and=20
fresnel</FONT></DIV></DIV>
<DIV><FONT face=3DArial><BR><FONT size=3D2></FONT></FONT></DIV><FONT =
face=3DArial=20
size=3D2>> <BR>> On Mar 22, 2005, at 9:30 AM, David R. Karger =
wrote:<BR>>=20
<BR>> > please be more precise about in-your-face urls?<BR>> =
<BR>>=20
</FONT><A href=3D"
http://www.w3.org/2001/sw/"><FONT face=3DArial=20
size=3D2>
http://www.w3.org/2001/sw/</FONT></A><FONT face=3DArial =
size=3D2> is an=20
in-your-face url.<BR>> <BR>> > i am sure fresnel shows =
rdfs:label if it=20
exists; question is what<BR>> > to do if there is =
none.<BR>>=20
<BR>> Exactly.<BR>> <BR>> Implementing variants of this problem =
in the=20
past (and generalizing <BR>> from various other implementations), the =
general=20
approach seems to be <BR>> hard-wired in code to look for =
(rdf:value, =20
rdfs:label, dc:title) and <BR>> then punt to an in-your-face url of =
the=20
'thing'. I'm hoping we can do <BR>> better than that. :)<BR>> =
<BR>>=20
Haystack seems to have gotten this pretty close. How is this being =
done?<BR>>=20
<BR>> As Emmanuel mentioned -<BR>> <BR>> "... fresnel:label (or =
at=20
least there is label in it, Chris or Ryan <BR>> will know better) and =
takes a=20
URI reference (indicating a property) as <BR>> the property value to =
be=20
considered as the label."<BR>> <BR>> seems to be a start towards=20
this.<BR>> <BR>> There are various issues to watch out for with =
objects=20
that are <BR>> multiple types (which in turn might have multiple=20
fresnel:label (s) but <BR>> thats a different thread.<BR>> =
<BR>> I just=20
wanted to make sure this feature was in there somewhere. :)<BR>> =
<BR>>=20
> Perhaps rather then showing url, fresnel<BR>> > should =
print=20
"unnamed <rdfs:Class of resource>"<BR>> <BR>> Yes. In the =
case of=20
not knowing the 'label', applications should <BR>> defaulting to some =
sort of=20
additional helpful display. While this <BR>> default will be =
application=20
specific in the case of Longwell / <BR>> PiggyBank / SemBank a linked =
version=20
of the above is preferable to <BR>> 'anonymous'.<BR>> <BR>> =
--<BR>>=20
eric=20
miller &=
nbsp; &n=
bsp; =20
</FONT><A href=3D"
http://www.w3.org/people/em/"><FONT face=3DArial=20
size=3D2>
http://www.w3.org/people/em/</FONT></A><BR><FONT face=3DArial =
size=3D2>>=20
semantic web activity=20
lead &nb=
sp; =20
</FONT><A href=3D"
http://www.w3.org/2001/sw/"><FONT face=3DArial=20
size=3D2>
http://www.w3.org/2001/sw/</FONT></A><BR><FONT face=3DArial =
size=3D2>> w3c=20
world wide web=20
consortium &nb=
sp;=20
</FONT><A href=3D"
http://www.w3.org/"><FONT face=3DArial=20
size=3D2>
http://www.w3.org/</FONT></A><BR><FONT face=3DArial =
size=3D2>> <BR>>=20
<BR>> <BR>> <BR>> > From </FONT><A=20
href=3D"mailto:general-return-345-karger=3Dcsail.mit.edu_at_simile.mit.edu">=
<FONT=20
face=3DArial=20
size=3D2>general-return-345-karger=3Dcsail.mit.edu_at_simile.mit.edu</FONT><=
/A><FONT=20
face=3DArial size=3D2> Tue Mar <BR>> > 22 09:23:55 =
2005<BR>> >=20
Mailing-List: contact </FONT><A =
href=3D"mailto:general-help_at_simile.mit.edu"><FONT=20
face=3DArial size=3D2>general-help_at_simile.mit.edu</FONT></A><FONT =
face=3DArial=20
size=3D2>; run by ezmlm<BR>> > X-No-Archive: yes<BR>> > =
Reply-To:=20
<</FONT><A href=3D"mailto:general_at_simile.mit.edu"><FONT face=3DArial=20
size=3D2>general_at_simile.mit.edu</FONT></A><FONT face=3DArial =
size=3D2>><BR>>=20
> To: </FONT><A href=3D"mailto:general_at_simile.mit.edu"><FONT =
face=3DArial=20
size=3D2>general_at_simile.mit.edu</FONT></A><BR><FONT face=3DArial =
size=3D2>> >=20
From: Eric Miller <</FONT><A href=3D"mailto:em_at_w3.org"><FONT =
face=3DArial=20
size=3D2>em_at_w3.org</FONT></A><FONT face=3DArial size=3D2>><BR>> =
> Subject:=20
toString and fresnel<BR>> > Date: Tue, 22 Mar 2005 09:23:52 =
-0500<BR>>=20
><BR>> > In your face URLs are a "bad thing".<BR>> =
><BR>> >=20
One of the uses I see of fresnel is being able to declaratively<BR>> =
>=20
indicate human readable "default" labels for arbitrary resources. =20
I<BR>> > suspect this is part of fresnel but I haven't seen this =
discussed=20
yet.<BR>> > Can one of the fresnel folk confirm how this is =
currently=20
handled?<BR>> ><BR>> > I just want to make sure we don't =
miss the=20
simple use cases while<BR>> > dealing with the harder =
ones.<BR>>=20
><BR>> > --<BR>> > eric=20
miller &=
nbsp; &n=
bsp; =20
</FONT><A href=3D"
http://www.w3.org/people/em/"><FONT face=3DArial=20
size=3D2>
http://www.w3.org/people/em/</FONT></A><BR><FONT face=3DArial =
size=3D2>>=20
> semantic web activity=20
lead &nb=
sp; =20
</FONT><A href=3D"
http://www.w3.org/2001/sw/"><FONT face=3DArial=20
size=3D2>
http://www.w3.org/2001/sw/</FONT></A><BR><FONT face=3DArial =
size=3D2>>=20
> w3c world wide web=20
consortium &nb=
sp;=20
</FONT><A href=3D"
http://www.w3.org/"><FONT face=3DArial=20
size=3D2>
http://www.w3.org/</FONT></A><BR><FONT face=3DArial =
size=3D2>>=20
><BR>> ><BR>> </FONT></BODY></HTML>
------=_NextPart_000_0048_01C52ECA.354939B0--
Received on Tue Mar 22 2005 - 15:36:57 EST