SV: SV: FW: [plcs-dex] Unique constraints -> identification and versioning

[<mats.nilsson@fmv.se>]

Hi David,

This is one of your examples of a "class.id URI";

>> urn:iso:std:iso:ts:10303:-1017:ed-1:tech-taxonomy:Part

If I understand you correctly, you suggests to include both the URI for the RDL ("urn:iso:std:iso:ts:10303:-1017:ed-1:tech-taxonomy") as well as the class identifier ("Part") in the 'external_class.id' (the 'id' attribute in the 'external_class' entity).

I thought (see the last of my three slides) 'external_class_library.id' was going to be used for the URI of the RDL, and that the identifier within the RDL (i.e. 'external_class.id') only should contain the actual "classification" or "term" identifier, in your example "Part".

Please help me understand if I've got things wrong! If someone else has an opinion, please help David help me...


Now over to your question David. In my not so organized world (I call it FMV...) people use more than one term for the same concept (concept=class). OWL has the 'rdfs:label' element, which makes it possible to assign more than one term for each class. This is useful for me because the guys who drive helocopters and those who drive boats often have different terminology, and I can use this functionality to make them understand each other and the data they send. There is also this need to be "interoperable" within e.g. the EU Battle Groups or NATO joint operations, and then we swedes meet people that uses the word "lubricate" for what we call "smörja"...

To accompish this I'd like to use a "meaningless" identifier for the 'external_class.id' field, e.g. "rd000453" (or with versioning "rd000453v1"), and then use the 'external_class.name' field for the readable classification (i.e. one of the available 'rdfs:label's in the RDL/OWL-file).

This was what I meant by the question;

>> David: How do you suggest the label used for 
>> classification should be identified in case there are multiple labels
>> for the same class/RD?

If I have both "lubricate" and "smörja" in the same class (that is a subclass of 'activity'/'task') with some unique id, I need to specify which one is used. 

Clearer? Or don't you see this scenario with synonyms and multiple languages (used for the same class/concept)? 

Regards,
  Mats



-----Ursprungligt meddelande-----
Från: David Price [mailto:david.price@eurostep.com] 
Skickat: den 18 december 2006 18:05
Till: plcs-dex@lists.oasis-open.org
Ämne: Re: SV: FW: [plcs-dex] Unique constraints -> identification and versioning

Hi Mats, a few replies follow (although I'm confused by one question.

On Monday 18 December 2006 07:51, mats.nilsson@fmv.se wrote:
> Questions below...
> Happy for opinions!
>
> Regards,
>   Mats
>
> >> David: Could you please give an example of what an (external) class.id
> >> URI could look like? 

It would be a URN or a URL depending on what organization defines it the class 
and the approach they happen to have adopted. It would be the compete URI for 
the class though it's technically only the identifier and so may not be 
sufficient for location (e.g. if it's a URN then some other means would have 
to be established for an application/user to find more info about the 
class ... for example, an organization might have to buy an ISO standard). 
Examples could be:

urn:iso:std:iso:ts:10303:-1017:ed-1:tech-taxonomy:Part

http://schema.omg.org/spec/UML/2.1/ParameterDirectionKind

http://www.madeupdod.mil/ActivityOntology#Training

> >> David: How do you suggest the label used for 
> >> classification should be identified in case there are multiple labels
> >> for the same class/RD?

I don't understand what "the label used for classification" means. Can you 
rephrase the question or explain that phrase?

Cheers,
David