- From: Luis Bermudez <lbermudez@opengeospatial.org>
- Date: Mon, 12 Mar 2012 13:26:05 -0400
- To: "Irene Polikoff" <irene@topquadrant.com>
- Cc: "'Thomas, George \(OS/ASA/OCIO/OEA\)'" <George.Thomas1@hhs.gov>, "'Dan Gillman'" <Gillman.Daniel@bls.gov>, 'Benedikt Kämpgen' <kaempgen@fzi.de>, <public-gld-wg@w3.org>, "'Ralph Hodgson'" <Ralph.Hodgson@nasa.gov>
Irene, Ralph and WG Excellent. QUDT is a good example of units encoded in an ontology that can be used in O&M. If we were to recommend the use of this units ontology, then we should point to the units vocabulary [1], where for example Kelvin is identified as http://qudt.org/vocab/unit#Kelvin. [1] http://qudt.org/1.1/vocab/OVG_units-qudt-(v1.1).ttl Luis ------------- Luis Bermudez lbermudez@opengeospatial.org +1 (301) 760-7323 The OGC: Making Location Count... http://www.opengeospatial.org/contact On Mar 12, 2012, at 12:57 PM, Irene Polikoff wrote: > Ralph Hodgson who leads QUDT effort sent an e-mail to the list regarding > QUDT, but his message never got posted. I am repeating the content of the > e-mail below: > > I am the ontology lead for NASA's QUDT work. QUDT stands for 'Quantities, > Units, Dimensions and Types'. > > QUDT has a website at http://qudt.org and catalog pages at > http://www.linkedmodel.org/catalog/qudt/1.1/index.html, where you can > download OWL models (schemas) and vocabularies. > > QUDT has both a simple representation of units and a full dimensional > treatment. Using dimensions the ontology can compute quantities from > quantity expressions. For example, you can ask what is the quantity I get if > I multiply a mass and an acceleration. Using rules over dimensions, the > ontology will answer 'Force'. > > QUDT can be browsed using SPIN Services - an ontology driven user interface > approach based on "SPARQL Web Pages". You can use this link as an example - > http://spinservices.org:8080/spin/doc.swp?baseURI=http://qudt.org/1.1/vocab/ > dimensionalunit > > QUDT will become a NASA Handbook this year. We are working on a new release > of QUDT that will have substantially more systems of quantities and both > RDF/OWL and XML representations. We will also have support for measurements, > observations and calibrations. > > This will be release 2.0 because of changes we are doing on URIs. > > Irene Polikoff > Mobile Phone: +1 914-329-8576 > CEO, www.topquadrant.com, @TopQuadrant > Voyages of the Semantic Enterprise > Trainings: Introduction to Semantic Web Technologies: What They are and How > to Use Them - Next Class, March 5-8, 2012; > TopBraid Suite Advanced Product Training - Next Class, May 21-24 , 2012 > > > > -----Original Message----- > From: Thomas, George (OS/ASA/OCIO/OEA) [mailto:George.Thomas1@hhs.gov] > Sent: Monday, March 12, 2012 10:01 AM > To: Luis Bermudez; Dan Gillman > Cc: Benedikt Kämpgen; public-gld-wg@w3.org > Subject: Re: Observations and Measurement - draft > > At the GLD-WG F2F1 [1] a presentation was given by TopQuadrant [2] on > 'Linked Data Models' [3], which mentions a number of interesting > ontologies including QUDT [4] that might be of interest here. > > -g > > [1] http://www.w3.org/2011/gld/wiki/F2F1 > [2] http://www.topquadrant.com/ > [3] > http://www.topquadrant.com/resources/Internal%20Presentations/TQ%20-%20Link > edModels.ppt > [4] http://qudt.org/ > > On 3/9/12 9:55 AM, "Luis Bermudez" <lbermudez@opengeospatial.org> wrote: > >> Hi Dan >> >> Good questions. >> >> Observation and Measurement (O&M) is the overall container for >> different concepts related to observations: Procedure, Property, Feature >> of Interest and Result. I recently learned that there is an O&M ontology >> [2] developed by CSIRO. Simon Cox is the editor of O&M and he also >> developed this ontology. I think it is fairly new so I do not think there >> are a lot of examples out there. However some examples of O&M in XML can >> be found at the OGC Schemas repositories [1]. This can help clarify what >> you can do with O&M. O&M also provides details of how the result can be >> expressed depending on the result type. For example the ontology has >> subclasses based on the type of observation, such as CategoryObservation, >> CountObservations and GeometryObservation. >> >> The Result not only contains the values but also the units of measure. >> Dealing with Units of Measure is at another level and should be treated >> separately. A units of measure ontology should contain enough information >> that lets you know how to make conversions from one unit to another, or >> if two values can be comparable. Similarly, the same applies for the >> other main components of O&M, like Feature of Interest or Procedure. >> They should all have specialize ontologies. For example different >> ontologies can exist and be plugged in that properly describe procedures >> for statistical methods, numerical models or sensors. >> >> Within OGC there are two ways to express Units of Measure: 1) via URIs, >> defined in an ontology or 2) using UCUM [3]. UCUM is very well designed. >> It is based on base units and nomenclature that can be use to express all >> the other units. It has also an API. I know ontolog [4] also worked on a >> units ontology and they looked at UCUM. I'm not sure about the status of >> the ontolog work but I can ask. I also know that UCUM deals with the >> dimension issue you mentioned. See specification, Section 3 semantics [5] >> and example for Healthcare Units [6]. >> >> >> [1] http://schemas.opengis.net/om/2.0/examples/ >> [2] http://def.seegrid.csiro.au/ontology/isotc211/om >> [3] http://unitsofmeasure.org/ >> [4] http://ontolog.cim3.net/cgi-bin/wiki.pl?UoM_Ontology_Standard >> [5] http://aurora.regenstrief.org/~ucum/ucum.html >> [5] http://www.hl7.de/download/documents/ucum/ucumdata.html >> >> Best Regards, >> >> Luis >> ------------- >> Luis Bermudez >> lbermudez@opengeospatial.org >> +1 (301) 760-7323 >> >> The OGC: Making Location Count... >> http://www.opengeospatial.org/contact >> >> >> >> >> On Mar 8, 2012, at 5:09 PM, Gillman, Daniel - BLS wrote: >> >>> Luis, >>> >>> In this Observation and Measurement scheme, is there a way to record >>> equivalent units of measure? Suppose I am measuring the speed of a car >>> using a radar gun on some road at a dangerous curve where people usually >>> drive too fast, and the radar gun reports the speed in miles per hour. >>> Then, suppose someone else repeats the experiment using the same radar >>> gun, but the machine is set to report kilometers per hour instead. How >>> do we know that all data reported in mph can be converted to data in >>> kph, and vice-versa? >>> >>> The ISO/IEC 11179 standard >>> (http://standards.iso.org/ittf/PubliclyAvailableStandards/index.html) >>> introduced the notion of dimensionality, the name coming from the >>> dimensional analysis that scientists use to convert units of measure. >>> However, this takes a wider view to include units of measure that are >>> not a part of the scientific set, and the idea doesn't depend on the >>> faux algebra of cancelling the same units in numerator and denominator. >>> >>> Dimensionality depends chiefly on the set of operations, very similar >>> to datatypes, that data in a unit of measure are allowed. Take >>> temperatures measured in degrees Celsius. One can subtract them, take >>> averages and similar statistics, but scalar multiplication makes no >>> sense. For instance, twice 10C is not 20C. Therefore, data in degrees >>> Fahrenheit are convertible to Celsius, since they share the same >>> operations. Interestingly, under this definition, Kelvin is not an >>> equivalent measuring system, and that is because scalar multiplication >>> makes sense in Kelvin. >>> >>> Yours, >>> Dan >>> >>> >>> Dan Gillman >>> Bureau of Labor Statistics >>> Office of Survey Methods Research >>> 2 Massachusetts Ave, NE >>> Washington, DC 20212 USA >>> Tel +1.202.691.7523 >>> FAX +1.202.691.7426 >>> Email Gillman.Daniel@BLS.Gov >>> ----------------------------------------- >>> "He has all the virtues I dislike >>> and none of the vices I admire." >>> - Winston Churchill >>> ------------------------------------------ >>> >>> >>> >>> -----Original Message----- >>> From: Luis Bermudez [mailto:lbermudez@opengeospatial.org] >>> Sent: Thursday, March 01, 2012 11:10 AM >>> To: Benedikt Kämpgen >>> Cc: public-gld-wg@w3.org >>> Subject: Observations and Measurement - draft >>> >>> All, >>> >>> Comments about Observations and Measurement related to: >>> >>> - Section: Publishing Statistical Data >>> - http://www.w3.org/2011/gld/track/issues/32 >>> - @@TODO: Are there any statements about compatibility and >>> interoperability between O&M and Data Cube that can be made to give >>> guidance to such organizations? >>> >>> Suggest to use Observations and Measurements (OM) model. >>> >>> An Observation is an event whose result is an estimate of the value of >>> some property of a feature of interest, obtained using a specified >>> procedure. >>> >>> An Observation has essentially the following parts: >>> >>> Procedure: e.g. person, sensor, observatory, model, macro. >>> Property: e.g. temperature, color, weight. >>> Feature of Interest: e.g. body, world, Washington DC, banana, specimen >>> 123, Monterey Bay. >>> Result: The actual value. Includes categories and quantities results, >>> time series, multimedia (video, audio), one single value, a file, etc. >>> >>> So in the figure: "Modeling quantity, measurement, observation" we can >>> do the following: >>> >>> Add Procedure, Result, Feature of Interest and Property Model Person as >>> a type of Procedure Remove Measurement Category and Quantity are >>> subclass of result. >>> Phenomenon Type is same as Property >>> >>> >>> Luis >>> ------------- >>> Luis Bermudez >>> lbermudez@opengeospatial.org >>> +1 (301) 760-7323 >>> >>> The OGC: Making Location Count... >>> http://www.opengeospatial.org/contact >>> >>> >>> >>> >>> On Feb 22, 2012, at 11:38 AM, Benedikt Kämpgen wrote: >>> >>>> Hello, >>>> >>>> We have further refined the Data Cube use cases and copied the content >>>> from the wiki into an Editor's Draft for "Use Cases and Requirements >>>> for the Data Cube Vocabulary" [1]. >>>> >>>> Feedback of any kind would be well appreciated. >>>> >>>> Best, >>>> >>>> Benedikt >>>> >>>> [1] >>>> <http://dvcs.w3.org/hg/gld/raw-file/default/data-cube-ucr/index.html> >>>> >>>> >>>> >>>> -- >>>> AIFB, Karlsruhe Institute of Technology (KIT) >>>> Phone: +49 721 608-47946 >>>> Email: benedikt.kaempgen@kit.edu >>>> Web: http://www.aifb.kit.edu/web/Hauptseite/en >>>> >>>> >>>> >>>> >>>> >>> >>> >>> >>> >> >> > > >
Received on Monday, 12 March 2012 17:26:35 UTC