qudt revisited

[Bohms, H.M. (Michel)]

Hi Irene, (Ralph)

 

Following our discussions on property modelling I went back to qudt again.

(1.1 since 2.0 is too limited published for now).

 

I try to reuse C:\Users\bohmshm\TBCMEWorkspace6.2\TopBraid\LinkedModels/qudt.ttl.

 

There is:

 

qudt-v1:quantity

  rdf:type owl:ObjectProperty ;

  dc:description "a property to relate an observable thing with a quantity (qud:Quantity)" ;

  rdfs:label "quantity" ;

.

 

1.

Mentions a qud:Quantity

 

Is this a typo? I can’t find the qud prefix.

 

But moreover: I cannot find qudt:Quantity in that file.

 

2.

Same issue for:

 

qudt-v1:value

  rdf:type owl:ObjectProperty ;

  dc:description "A property to relate an observable thing with a quantity value (qud:QuantityValue)" ;

  rdfs:label "value" ;

.

 

3.

In:

C:\Users\bohmshm\TBCMEWorkspace6.1\TopBraid\LinkedModels

 

There is unfortunately not a ttl file for quantity.ttl vocab of qudt1.1.

Is there a special reason?

 

 

Thx for help so that I can reformulate my property model in terms od qudt1.1.

 

Ps1

If problematic I can still only reuse the qudt1.1 units and quantitykinds since these are both dereferenceable.

 

Ps2

Ralph, I would welcome a preview of the basic quantities for 2.0 if avail. I see the 2.0 units are deref. but there are no quantity things avail.

Dr. ir. H.M. (Michel) Böhms Senior Data Scientist T +31888663107 M +31630381220 E michel...@tno.nl Location   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.

 

 

[Bohms, H.M. (Michel)]

Moreover:

 

    In http://qudt.org/1.1/vocab/quantity

 

There are (in parallel!):

 

   xmlns:qudt-quantity=http://qudt.org/vocab/quantity#

 

    xmlns:quantity=http://qudt.org/schema/quantity# (looks like an error...)

 

    xmlns:qudt-quantity-1.1=http://qudt.org/1.1/vocab/quantity#

 

and nowhere I can find my needed simple Length quantitykind:

 

In the file it is used:

 

  <rdf:Description rdf:about="http://qudt.org/vocab/unit#Femtometer">

    <qudt:quantityKind rdf:resource="http://qudt.org/vocab/quantity#Length"/>

  </rdf:Description>

 

Suggesting the Length is in the qudt-quantity prefix variant, but it isn’t as far as I can see.

 

Who can help me out?

[AW]

Hi Michel,

Just writing to say that I'm interested in following your experience with QUDT.    We looked into using it at one point.    The complexity was daunting, and we decided against it for something much simpler of our own design.   I hope you'll post further about your experience.

Anne

[Bohms, H.M. (Michel)]

I will.

Complexity is ok imho, it’s just that it takes so long to have the resources available/online.

 

 

 

Dr. ir. H.M. (Michel) Böhms Senior Data Scientist T +31888663107 M +31630381220 E michel...@tno.nl Location   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.

 

 

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[Anne Wilson]

Thank you, Michel.   If the underlying resources are not available, that also seems like a barrier.

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[Steve Ray]

Hi Michel and Anne,

Please take another look at qudt.org, and check out our Release 2.1

I have been busy organizing things there, and now all our units and quantity kinds are dereferenceable.

I'm currently working on the dimension vectors.

I'm hoping that what is published is at least consistent (in terms of qnames), and am focusing on getting a core set of units, quantity kinds and dimension vectors available.

Then we will go back and clean up. Please let me know if there are key units or quantity kinds that you are particularly interested in.

 - Steve Ray

On Thursday, July 18, 2019 at 9:24:33 AM UTC-7, AW wrote:

Thank you, Michel.   If the underlying resources are not available, that also seems like a barrier.

On Thu, Jul 18, 2019 at 12:46 AM 'Bohms, H.M. (Michel)' via TopBraid Suite Users <topbrai...@googlegroups.com> wrote:

I will.

Complexity is ok imho, it’s just that it takes so long to have the resources available/online.

 

 

 

Dr. ir. H.M. (Michel) Böhms Senior Data Scientist T +31888663107 M +31630381220 E michel...@tno.nl Location   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.

 

 

Van: topbrai...@googlegroups.com <topbrai...@googlegroups.com> Namens AW
Verzonden: woensdag 17 juli 2019 17:06
Aan: TopBraid Suite Users <topbrai...@googlegroups.com>
Onderwerp: [topbraid-users] Re: qudt revisited

 

Hi Michel,

 

Just writing to say that I'm interested in following your experience with QUDT.    We looked into using it at one point.    The complexity was daunting, and we decided against it for something much simpler of our own design.   I hope you'll post further about your experience.

 

Anne

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[Bohms, H.M. (Michel)]

(late reply because of holidays...)

 

Dear Steve,

That is good news!

 

Some questions:

 

1-when I download the unit ttl it is still called 2.0 iso 2.1, is that ok?

2-IN the file the unit prefix is http://qudt.org/vocab/unit/ ... how is this related to the new base URI? Is it really dereferenceable this way?

 

I see it’s different for quantitikinds...this seems to work...why mot the same for units: ie use prefix:

http://qudt.org/2.1/vocab/unit/all for unit

(I see it IS available)

 

Thx Michel

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[Steve Ray]

Michel,

When did you last test the links? I'm getting the following results:

Clicking the "Turtle" button for units in the 2.1 catalog delivers qudt.org/2.1/vocab/unit/all, which begins with:

# baseURI: http://qudt.org/2.1/vocab/unit/all
# imports: http://qudt.org/2.0/schema/qudt/science
# imports: http://qudt.org/2.1/schema/qudt
# imports: http://qudt.org/2.1/vocab/quantitykind/all
# imports: http://www.linkedmodel.org/schema/vaem

Is your comment about the 2.0 version of http://qudt.org/2.0/schema/qudt/science? We haven't updated that part of the schema, so it is still 2.0.

Regarding your second question, perhaps you can help me figure out the following issue:

We want the unit: prefix to expand to http://qudt.org/vocab/unit

…and the quantitykind prefix to expand to http://qudt.org/vocab/quantitykind

On our website, the folder structure is:

qudt.org/

    vocab/

        unit/

            all (the ttl file containing the unit graph)

            A (the ttl file containing the definition of the Ampere)

            A-HR (the ttle file containing the definition of the Ampere-Hour)

            …etc

This structure therefore supports dereferencing:

qudt.org/vocab/unit/all for the units graph

qudt.org/vocab/unit/A for the definition of the Ampere

etc.

My problem is that the URI http://qudt.org/vocab/unit alone, dereferences to the folder that contains the other files (all, A, A-HR, etc…)

I think I would have to do some sort of redirection of the web server to make http://qudt.org/vocab/unit return the “all” file.

…and I’m not expert enough in web server configuration to know how to do that. Do you know how?

            

Steve

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[Bohms, H.M. (Michel)]

Hi Steve,

 

When I go to: http://www.qudt.org/2.1/catalog/qudt-catalog.html

 

I see still see 2.0 stuff (maybe intentional)

 

 

Furthermore when I download unit/all:

 

Normally my baseURIs are the same as the prefixes (well apart from a / or #).

So currently,

For example: unit:M (http://qudt.org/vocab/unit/M)

 

Cannot be found (is not dereferenceable).

 

Better to adapt base URIs? Delete the “all”-part? Same for quantities...

 

Gr Michel

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[Steve Ray]

Hi Michel,

Yes, those imported 2.0 graphs haven't changed so their inclusion is intentional.

Regarding the URI names that use the "all" in them, that is something I'm working on right now so that indeed the base URIs and the prefixes and dereferenceable. I'm a little surprised at your example, 

For example: unit:M (http://qudt.org/vocab/unit/M)

...because the link works fine for me, both from a browser, and from a terminal using curl.

Steve

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[Bohms, H.M. (Michel)]

All clear, thx

 

And yes link works here too so example was not ok

 

Guess your system works but still the all’s might better go making baseURIs and prefix the same?

 

Greetings Michel

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[Steve Ray]

Michel,

The URIs have been cleaned up, so now you can resolve the prefixes, and none of them contain the extraneous "all".

Steve

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[Bohms, H.M. (Michel)]

 

 

Sounds great Steve!

Will do testing asp.

 

Small quick question:

What would be the simplest way to be able to use te quantitykinds as datatypes?

(we now use CDT/UCUM here but I want to have aQUDT2.1 alternative/replacement).

 

So I can do:

:MyInstance :height “12.5 M”^^quantitykind:Length .

 

(earlier for qudt the unit was used that way in one of the use casese:

:MyInstance :height “12.5”^^unit:M .

)

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[Steve Ray]

Michel,

Try declaring QuantityKind a subclass of rdfs:Datatype 

Steve

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[Bohms, H.M. (Michel)]

 

 

Ok

I remember doing the same for unit in the past indeed!

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