QUDT - UCUM mappings ?

[Thad Guidry]

Beyond the integrating of QUDT into Schema.org...

Many of us in data exchange domains (Telecom, EDI, etc) have been using UCUM and I noticed that QUDT also has some UCUM classes and a property

qudt:UCUMcode - ucumCode associates a QUDT unit with its UCUM counterpart.

Anyone know where or if there is a mapping between QUDT and UCUM ?

-Thad
+ThadGuidry

[Jason Koh]

Hi Thad,

I do see some DataTypes related to UCUM in the current version of QUDT, but I don't see any usage of it in QUDT. I CC some of QUDT committee here, who may have an answer.

Jack, Steve, Simon,

Do you have any answer to Thad's question? He wants to know if there is some mapping between UCUM and QUDT.

With regards,

Jason Koh

cseweb.ucsd.edu/~jbkoh

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[Thad Guidry]

Base and Space/Time are the main ones that I was looking for.

Awesome.  Many Thanks Simon.

Is there a URL against any particular QUDT unit ?  I didn't see that.  We'd like to get some of this mapped into Wikidata itself as well.  I'll do the work there, like I do for Schema.org already unless you have plans to pick that effort up already within QUDT like do you do for dbpedia ?.  For instance, does Acre have a URI like http://qudt.org/2.0/vocab/unit/space-and-time/U150E0040  ? or similar ?

unit:AC
  rdf:type qudt:AreaUnit ;
  rdf:type qudt:DerivedUnit ;
  rdf:type qudt:ImperialUnit ;
  rdf:type qudt:US-CustomaryUnit ;
  rdf:type qudt:Unit ;
  qudt:abbreviation "acre" ;
  qudt:code "0040" ;
  qudt:conversionMultiplier "4046.8564224"^^xsd:double ;
  qudt:conversionOffset "0.0"^^xsd:double ;
  qudt:description "The acre is a unit of area in a number of different systems, including the imperial and U.S. customary systems. Its international symbol is ac. The most commonly used acres today are the international acre and, in the United States, the survey acre. The most common use of the acre is to measure tracts of land. One international acre is equal to 4046.8564224 square metres. "^^rdf:HTML ;
  qudt:hasQuantityKind quantitykind:Area ;
  qudt:id "U150E0040" ;
  qudt:symbol "acre" ;
  qudt:ucumCode "[ACR_BR]"^^qudt:UCUMci-term ;
  qudt:ucumCode "[acr_br]"^^qudt:UCUMcs-term ;
  qudt:uneceCommonCode "ACR" ;
  rdfs:isDefinedBy <http://qudt.org/2.0/vocab/unit/space-and-time> ;
  rdfs:isDefinedBy unit:space-and-time ;
  rdfs:label "Acre" ;
  skos:exactMatch <http://dbpedia.org/resource/Acre> ;
  skos:prefLabel "AC" ;
  prov:wasInfluencedBy <http://en.wikipedia.org/wiki/Acre?oldid=495387342> ;

On Tue, Mar 28, 2017 at 1:56 AM <Simo...@csiro.au> wrote:

Oh – I just checked again and the thermo, chem and EM sets _have_ been processed – its just that they are mostly derived units, so not many terminals with UCUM symbols to track down.

 

Simon

 

From: Cox, Simon (L&W, Clayton)
Sent: Tuesday, 28 March, 2017 17:17
To: 'Jason Koh' <jb...@eng.ucsd.edu>; Thad Guidry <thadg...@gmail.com>; Jack Hodges <jhodg...@gmail.com>; Steve Ray <stev...@sv.cmu.edu>
Cc: sdo-io...@googlegroups.com
Subject: RE: QUDT - UCUM mappings ?

 

I am responsible for the UCUM datatypes, which are permissive versions of the production rules for the UCUM terminals and codes.

The cardinalities and type constraints on qudt:ucumCode were also adjusted to match.

See http://qudt.org/2.0/schema/SCHEMA_QUDT-v2.0.ttl

 

I then worked my way through the initial unit vocabularies, and added the UCUM codes (both c/s and C/I) for the base units.

These are complete for the non-derived units

http://qudt.org/2.0/vocab/VOCAB_QUDT-UNITS-BASE-v2.0.ttl

http://qudt.org/2.0/vocab/VOCAB_QUDT-UNITS-SPACE-AND-TIME-v2.0.ttl

 

But these not yet processed

http://qudt.org/2.0/vocab/VOCAB_QUDT-UNITS-THERMODYNAMICS-v2.0.ttl

http://qudt.org/2.0/vocab/VOCAB_QUDT-UNITS-PHYSICAL-CHEMISTRY-AND-MOLECULAR-PHYSICS-v2.0.ttl

http://qudt.org/2.0/vocab/VOCAB_QUDT-UNITS-ELECTROMAGNETISM-v2.0.ttl

 

I did a few of the derived units for space-and-time, but stopped when I realised they are non-unique – e.g. m/s vs m.s-1

To a certain extent the last issue exposes the fundamentally different assumptions behind UCUM (which specifies the terminals, and a methods to generate a parseable symbol for any derived unit) and QUDT (which specifies a complete model and implied serialization for the description of any unit of measure). I do wonder if the QUDT vocabularies would be better factored into multiple graphs on this basis.

 

Simon

 

From: Jason Koh [mailto:jb...@eng.ucsd.edu]
Sent: Tuesday, 28 March, 2017 17:00
To: Thad Guidry <thadg...@gmail.com>; Cox, Simon (L&W, Clayton) <Simo...@csiro.au>; Jack Hodges <jhodg...@gmail.com>; Steve Ray <stev...@sv.cmu.edu>
Cc: sdo-io...@googlegroups.com
Subject: Re: QUDT - UCUM mappings ?

 

Hi Thad,

I do see some DataTypes related to UCUM in the current version of QUDT, but I don't see any usage of it in QUDT. I CC some of QUDT committee here, who may have an answer.

 

Jack, Steve, Simon,

Do you have any answer to Thad's question? He wants to know if there is some mapping between UCUM and QUDT.

 

With regards,

Jason Koh

cseweb.ucsd.edu/~jbkoh

 

On Mon, Mar 27, 2017 at 7:42 PM, Thad Guidry <thadg...@gmail.com> wrote:

Beyond the integrating of QUDT into Schema.org...

Many of us in data exchange domains (Telecom, EDI, etc) have been using UCUM and I noticed that QUDT also has some UCUM classes and a property

 

qudt:UCUMcode - ucumCode associates a QUDT unit with its UCUM counterpart.

Anyone know where or if there is a mapping between QUDT and UCUM ?

-Thad
+ThadGuidry

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[Thad Guidry]

Thanks for the update Simon.

1. How do you output TTL, JSON, or RDF from the formatted URI example of http://qudt.org/vocab/unit/AC through Topquadrant's SWP pages such as that ? or do you only provide .ttl for the complete sets ?

2. Did Wikidata property proposal goof up and use the wrong formatter URL of http://qudt.org/qudt/owl/1.0.0/unit/Instances.html#$1 ?

    https://www.wikidata.org/wiki/Wikidata:Property_proposal/QUDT_unit 

    https://www.wikidata.org/wiki/Q6014364

 The reason I ask is that notice on that Wikidata URL above how QUDT unit ID = InchPerSecond link goes to that Instances URL for InchPerSecond rather than the vocab URL.

The main reason I asked all of the above is that recently Wikidata opened up Federated queries using SPARQL, if you didn't know.

-Thad

+ThadGuidry  

On Tue, Mar 28, 2017 at 5:29 PM <Simo...@csiro.au> wrote:

If you expand the namespace prefix unit: you get

 

http://qudt.org/vocab/unit/AC etc.

 

*However* , Ralph has not yet put the mappings in place to make the individual resources available as Linked Data (i.e. from their http URIs).

My feeling is that this will hold us back bigly until it is fixed.

 

Simon