Michel,
You are right in that rdfs:Literal is a subclass of rdfs:Resource. When creating a form-based editing UI, we have to make some design decisions to ensure that users have a friendly interface for the majority of their editing operations. With this, if a property range is rdfs:Resource, TBC editing UI assumes a resource as in “an instance that either has a URI or is a blank node”. If the range is rdfs:Literal, it assumes a literal. This assumption holds well with user expectations for most cases. In my experience, rdf:value is rarely used and while the Primer circa 2004 talks about using it as a way to address the need for n-ary relationships, Primer circa 2014 does not say this nor does it mention rdf:value. I recommend you to create your own value property and give it a literal range. If desired, you can make it a subproperty of rdf:value. If, for some reason, this doesn’t work – there is an option to use the source code tab. Irene From: [email protected] [mailto:[email protected]] On Behalf Of Bohms, H.M. (Michel) Sent: Thursday, October 02, 2014 11:38 AM To: [email protected] Subject: RE: [topbraid-users] support for rdf:value Or yet diff. Formulated: Isnt rdfs:Literal a subclass of rdfs:Resource and hence I should be able to fill in a literal? Dr. ir. H.M. (Michel) Bohms Sr. Research Scientist Structural Reliability T +31 (0)88 866 31 07 M +31 (0)63 038 12 20 E <mailto:[email protected]> [email protected] <http://www.tno.nl/locaties/DTM> Location <http://www.tno.nl/> This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. TNO accepts no liability for the content of this e-mail, for the manner in which you use it and for damage of any kind resulting from the risks inherent to the electronic transmission of messages. From: [email protected] [mailto:[email protected]] On Behalf Of Bohms, H.M. (Michel) Sent: donderdag 2 oktober 2014 17:34 To: [email protected] Subject: RE: [topbraid-users] support for rdf:value In other words: when I give the value in code tab and get in forms-tab: What happened? Is it now a resource after all? Dr. ir. H.M. (Michel) Bohms Sr. Research Scientist Structural Reliability T +31 (0)88 866 31 07 M +31 (0)63 038 12 20 E <mailto:[email protected]> [email protected] <http://www.tno.nl/locaties/DTM> Location <http://www.tno.nl/> This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. TNO accepts no liability for the content of this e-mail, for the manner in which you use it and for damage of any kind resulting from the risks inherent to the electronic transmission of messages. From: [email protected] [mailto:[email protected]] On Behalf Of Bohms, H.M. (Michel) Sent: donderdag 2 oktober 2014 17:30 To: [email protected] Subject: RE: [topbraid-users] support for rdf:value Thx scott/irene thx But can I still use it to store a value like “12.0”^^xsd:float? Dr. ir. H.M. (Michel) Bohms Sr. Research Scientist Structural Reliability T +31 (0)88 866 31 07 M +31 (0)63 038 12 20 E <mailto:[email protected]> [email protected] <http://www.tno.nl/locaties/DTM> Location <http://www.tno.nl/> This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. TNO accepts no liability for the content of this e-mail, for the manner in which you use it and for damage of any kind resulting from the risks inherent to the electronic transmission of messages. From: [email protected] [mailto:[email protected]] On Behalf Of Irene Polikoff Sent: donderdag 2 oktober 2014 17:26 To: [email protected] Subject: Re: [topbraid-users] support for rdf:value To add to this, the answer is apparent from the user interface. In the image below, you can see a purple diamond to the left of rdf:value field. This means that a resource, not a literal is expected. Irene On Oct 2, 2014, at 11:16 AM, Scott Henninger <[email protected]> wrote: Michel, the domain and range of rdf:value is rdf:Resource, so I would suggest using "Create and add..." or "Create blank node...". -- Scott On 10/2/2014, 9:42 AM, Bohms, H.M. (Michel) wrote: Think I ws unclear: if you try to add rdf:value 12.0 via the form tab, the box stays red <mime-attachment.png> When you do it in source code tab: And then switch you get: <mime-attachment.png> So fine. Clearly, I’dd like to be able to use the forms tab in the first place… Dr. ir. H.M. (Michel) Bohms Sr. Research Scientist Structural Reliability T +31 (0)88 866 31 07 M +31 (0)63 038 12 20 E <mailto:[email protected]> [email protected] <http://www.tno.nl/locaties/DTM> Location <http://www.tno.nl/> <mime-attachment.gif> This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. TNO accepts no liability for the content of this e-mail, for the manner in which you use it and for damage of any kind resulting from the risks inherent to the electronic transmission of messages. From: [email protected] [mailto:[email protected]] On Behalf Of Scott Henninger Sent: donderdag 2 oktober 2014 16:07 To: [email protected] Subject: Re: [topbraid-users] support for rdf:value Michel; Yes, rdf:value is supported in TopBraid. One way to verify is to CONSTRUCT some rdf:value values: CONSTRUCT { exproduct:item10245 exterms:weight _:weight10245 . _:weight10245 rdf:value "2.4"^^xsd:decimal . _:weight10245 exterms:units exunits:kilograms . } WHERE { } Also, the properties pane does not show all properties in the RDF vocabulary. See Preferences > TopBraid Composer > Properties View and you can select rdf:value to appear in the Properties View. -- Scott On 10/1/2014, 6:30 AM, Bohms, H.M. (Michel) wrote: I define a pattern where a quantity class has a value and a unit. I defined ext:hasValue for this myself. I discovered however in http://www.w3.org/TR/2004/REC-rdf-primer-20040210/#rdfvalue the existing construct for exactly this purpose! (n-ary relationships/structured values). But is this rdf:value supported in TBC? I cant find it :) Thx for feedback, Michel Dr. ir. H.M. 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