Hi David,
> 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.
Sure, no problem. We can use fresnel:alternateProperties to encode this behaviour. See:
http://simile.mit.edu/repository/fresnel/trunk/docs/manual/FresnelVocabulary.htm#alternateandmerged
Example:
:smartDefaultLens rdf:type fresnel:Lens ;
fresnel:domain foaf:Person ;
fresnel:purpose fresnel:defaultLens ;
fresnel:showProperties
( [ rdf:type fresnel:propertyDescription
fresnel:alternateProperties ( foaf:name
foaf:surname
vcard:name
ex:alsoAName
rdfs:label
dc:title ) ] ) .
But I would rather like to hardwire some defaults, so that the usual stuff is also tried when we don't have such smart defaultLenses.
This defaults could be realized by a labelLens using alternateProperties and having the domain rdfs:Class as you proposed or be hardwired into the browser. Both is possible.
Chris
>
> Mailing-List: contact general-help_at_simile.mit.edu; run by ezmlm
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> From: "Chris Bizer" <bizer_at_gmx.de>
> Date: Tue, 22 Mar 2005 10:30:46 -0500
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>
> 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>
>
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>
Received on Thu Mar 24 2005 - 15:30:45 EST