qudt name spaces

[Bohms, H.M. (Michel)]

I am confused now by name spaces of qudt, which one to use if I want to reuse quantities like “Length”

 

http://qudt.org/schema/qudt

http://qudt.org/schema/qudt-quantity

http://qudt.org/vocab/qudt

 

and which prefixes?

 

Thx a lot for any help, Michel

 

 

Dr. ir. H.M. (Michel) Böhms Sr. Research Scientist Technical Sciences T +31 (0)88 866 31 07 M +31 (0)63 038 12 20 E michel...@tno.nl Location Disclaimer

 

 

[Ralph TQ [Gmail]]

QUDT namespaces are partitioned as schema graphs and vocab graphs as shown in the catalog ontology architecture at http://www.linkedmodel.org/catalog/qudt/1.1/index.html

It is important to know that the base URI of a graph can be different to the resources it contains. Also that there are versioned graphs with a version number in the base URI and non-versioned graphs without a numeric version identifier.

The following table summarizes some of what you can find at the QUDT v1.1 catalog (URL above).

qudt schema:
	defined in graph with base URI:	http://qudt.org/schema/qudt
	resource namespace:	http://qudt.org/schema/qudt#
	resource namespace prefix:	qudt
	example use:	http://qudt.org/schema/qudt#SpaceAndTimeUnit or
		qudt: SpaceAndTimeUnit
	catalog entry:	http://www.linkedmodel.org/doc/qudt/1.1/index.html
quantity schema:
	defined in graph with base URI:	http://qudt.org/schema/quantity
	resource namespace:	http://qudt.org/schema/qudt#
	resource namespace prefix:	qudt
	example use:	http://qudt.org/schema/qudt#SpaceAndTimeQuantityKind or
		qudt:SpaceAndTimeQuantityKind
	catalog entry:	http://www.linkedmodel.org/doc/quantity/1.1/index.html
unit vocabulary:
	defined in graph with base URI:	http://qudt.org/vocab/unit
	resource namespace:	http://qudt.org/vocab/unit#
	resource namespace prefix:	unit
	example use:	http://qudt.org/vocab/unit#Meter or
		unit:Meter
	catalog entry:	http://www.linkedmodel.org/doc/unit/1.1/index.html
quantity kind vocabulary:
	defined in graph with base URI:	http://qudt.org/vocab/quantity
	namespace:	http://qudt.org/vocab/quantity#
	namespace prefix:	qudt-quantity
	example use:	http://qudt.org/vocab/quantity#Length or
		qudt-quantity:Length
	catalog entry:	http://www.linkedmodel.org/doc/qudt-quantity/1.1/index.html

 

If you are wanting to express an instance of something like a length that needs further discussion. Values, often spoken of as measurements, are different to quantity kinds.

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[Michel Bohms]

Thx this really helps (I used the wrong schema one...).

Next issue I have is with the many imports I need vaem etc. only using the quantity vocabulary.

I put this one a bit better specified in a seperate mail.

thx a lot, Michel

2013/6/28 Ralph TQ [Gmail] <rhod...@topquadrant.com>

[Bohms, H.M. (Michel)]

Ok, as said earlier my next issue with qudt.

 

I just want to reuse the quantity kinds, so I now use the right vocab…

 

I then get:

 

Is this really needed for my purpose?

 

I want my own ontologies as clean as possible not showing all the underlying details.

 

(BTw: protégé even gives an error wrt the vaem ontology)

 

Thx again for advice, Michel

 

Dr. ir. H.M. (Michel) Böhms Sr. Research Scientist Technical Sciences T +31 (0)88 866 31 07 M +31 (0)63 038 12 20 E michel...@tno.nl Location Disclaimer

 

[Scott Henninger]

Michel; One way to get around the issue of "big imports" is to simply reuse the URI.  One method that works nicely is to "move" resources between files.  See TopBraid Composer > How to? > Refactor ontologies > Move resources between files

I rather like Option 2, dragging the resources on to the Navigator View, but the choice is yours.  The operation is explicitly a "move" but if you don't save the qudt file (i.e. the source file), then it's effectively a "copy".

This will give you the right URIs, and if you fiddle with it a bit, all of the right subclass, subproperty, etc. relationships can be copied to your own file.  Effectively, you can create your own version of QUDT that is as big or small as you want.  And you don't really have to reuse the entire resource (i.e. the {<resource> ?p ?o>}).  Just copy the URIs you want and you can rest assured that your data/ontology will merge nicely with others.

RDF is rather flexible that way...

-- Scott