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Re: (Round 2) Proposed Extensions to OWL

From: Roger L. Costello <costello@mitre.org>
Date: Tue, 08 Jul 2003 13:17:59 -0400
Message-ID: <3F0AFCC7.3B172CFC@mitre.org>
To: www-rdf-interest@w3.org
CC: tpassin@comcast.net, "Costello,Roger L." <costello@mitre.org>

Tom, I have read your latest proposal several times.  Let me see if I
understand it.

The idea is to define an ontology of standard functions.  For example,
this defines how to transform miles into kilometers:

Standard Functions Ontology:

<owlx:Transform rdf:ID="MilesToKilometers">
      <owlx:tolerance>5%</owlx:tolerance>
      <owlx:inputValue>miles</owlx:inputValue>
      <owlx:outputValue>kilometers</owlx:outputValue>
      <owlx:inputUnits rdf:resource="#Miles"/>
      <owlx:outputUnits rdf:resource="#Kilometers"/>
      <owlx:transform>miles = kilometers * 0.62</owlx:transform>
</owlx:Transform>

Suppose an application were to receive this document:

<River rdf:ID="Yangtze">
   <length>
      <Length>
         <measurement>
            <LengthMeasurement>
                <measurementValue>
                   <LengthValue>
                      <numericalValue>3914</numericalValue>
                      <unitSpecification rdf:resource="#Miles"/>
                   </LengthValue>
               </measurementValue>
               <precision>...</precision>
               <source>...</source>
            </LengthMeasurement>
         </measurement>
      </Length>
   </length>
</River>

And suppose the application wanted to convert the length data in the
document to a value with units of kilometers.

The application would "consult" the Standard Functions Ontology for a
Transform which has inputUnits = Miles and outputUnits = Kilometers.
The transform property then details how to convert the numerical miles
value into a numerical kilometers value.

Is this an accurate summary of your proposal?  /Roger
Received on Tuesday, 8 July 2003 13:18:06 GMT

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