Channel 9 - Discussions by MovGP0 http://mschnlnine.vo.llnwd.net/d1/Dev/App_Themes/C9/images/feedimage.png Channel 9 - Discussions by MovGP0 http://channel9.msdn.com/Niners/MovGP0/Discussions Channel 9 keeps you up to date with the latest news and behind the scenes info from Microsoft that developers love to keep up with. From LINQ to SilverLight – Watch videos and hear about all the cool technologies coming and the people behind them. http://channel9.msdn.com/Niners/MovGP0/Discussions en Wed, 22 May 2013 21:34:05 GMT Wed, 22 May 2013 21:34:05 GMT Rev9 0 0 0 Coffeehouse - Geek Code Why r all posting v3.1 and v3.2 Comments when the actual release is v3.12?

]]> http://channel9.msdn.com/Forums/Coffeehouse/111392-Geek-Code/250c1270c0f84aa1abd29deb00dd6e04#250c1270c0f84aa1abd29deb00dd6e04 Thu, 15 Sep 2005 01:34:59 GMT http://channel9.msdn.com/Forums/Coffeehouse/111392-Geek-Code/250c1270c0f84aa1abd29deb00dd6e04#250c1270c0f84aa1abd29deb00dd6e04 MovGP0 10 http://channel9.msdn.com/Niners/MovGP0/Discussions/RSS Coffeehouse - Geek Code 
-----BEGIN GEEK CODE BLOCK-----
   Version: 3.12
GCM/E/IT/S/TW/CC$ d s-: a-- C++ B L+ P E--- W+++ N++ o-- K- w++ O M V- PS- PE Y+ PGP t+ 5+ X R tv b++ DI D G e h! !r !y+
------END GEEK CODE BLOCK------

]]> http://channel9.msdn.com/Forums/Coffeehouse/111392-Geek-Code/aa373c3097e34d5b96509deb00dd6db5#aa373c3097e34d5b96509deb00dd6db5 Thu, 15 Sep 2005 01:32:59 GMT http://channel9.msdn.com/Forums/Coffeehouse/111392-Geek-Code/aa373c3097e34d5b96509deb00dd6db5#aa373c3097e34d5b96509deb00dd6db5 MovGP0 10 http://channel9.msdn.com/Niners/MovGP0/Discussions/RSS Coffeehouse - Semantic Mapping Question

Karim wrote:
I would have thought someone would have come up with an ontology for volts and other electrical units already...?


The use of electical units was just an Example. The Problem I want to address ist the n:m mapping of RDF/OWL-Structures. Currently there is only 1:1 Class/Property mapping in the art:

<unit:V rdf:ID="V">
   <owl:sameAs rdf:resource="&unit;Volt" />
</unit:V>

I think that is a limitation of OWL; but maybe someone is genius enought to find a better solution than mine.

But u're right - maybe should posted on techof...

]]> http://channel9.msdn.com/Forums/Coffeehouse/107444-Semantic-Mapping-Question/18f8b7a17b7a4848aad69dec00760105#18f8b7a17b7a4848aad69dec00760105 Mon, 12 Sep 2005 09:40:47 GMT http://channel9.msdn.com/Forums/Coffeehouse/107444-Semantic-Mapping-Question/18f8b7a17b7a4848aad69dec00760105#18f8b7a17b7a4848aad69dec00760105 MovGP0 4 http://channel9.msdn.com/Niners/MovGP0/Discussions/RSS Coffeehouse - Semantic Mapping Question The following is a, quick written but not syntactically correct, Example with some propritary Elements (owlx):

<rdf:comment>Mapping of "x/y" to "x*y^(-1)"</rdf:comment>

<owlx:Mapping>
    <owlx:Struct>
        <owl:InstanceOf rdf:resource="&math;Division" />
        <math:Dividend>
            <owlx:InstanceOf rdf:resource="#Variable01" />
        </math:Dividend>
        <math:Divisor>
            <owlx:InstanceOf rdf:resource="#Variable02" />
        </math:Divisor>
    </owlx:Struct>
    <owlx:Struct>
        <owl:InstanceOf rdf:resource="&math;Multiplication" />
        <math:Variable>
            <owlx:InstanceOf rdf:resource="#Variable01" />
        </math:Variable>
        <math:Variable>
            <owl:InstanceOf rdf:resource="&math;Exponentiation" />
            <math:Base>
                <owlx:InstanceOf rdf:resource="#Variable02" />
            </math:Base>
            <math:Exponent rdfs:datatype="&xsd;Integer">-1</math:Exponent>
        </math:Variable>
    </owlx:Struct>
</owlx:Mapping>


<rdf:type rdf:ID="Variable01" rdf:resource="&math;Variable" />
<rdf:type rdf:ID="Variable02" rdf:resource="&math;Variable" />

]]> http://channel9.msdn.com/Forums/Coffeehouse/107444-Semantic-Mapping-Question/5e4e9f0fbdbe407ca8679dec007600b2#5e4e9f0fbdbe407ca8679dec007600b2 Sun, 11 Sep 2005 23:22:50 GMT http://channel9.msdn.com/Forums/Coffeehouse/107444-Semantic-Mapping-Question/5e4e9f0fbdbe407ca8679dec007600b2#5e4e9f0fbdbe407ca8679dec007600b2 MovGP0 4 http://channel9.msdn.com/Niners/MovGP0/Discussions/RSS Coffeehouse - Semantic Mapping Question Hi,
I'm not shure if this is the right place to ask for semantic web issures, but there only very few Forums out there for such things.
I've tried to make an RDF/OWL-ontology for units (ie. Volt). But the problem ist to map ie. the Class "Volt" to it's Definition of:

1 V = 1 kg m2 s-3 A-1

Even it's possible to make properties like "isDirectProportionalTo" and "isIndirectProportionalTo" it's awful to use:

V isDirectProportionalTo kg
V isDirectProportionalTo m (1)
V isDirectProportionalTo m (2)
...

I think that a better way may be to handle that within an external Math-Schema. But then I get the similar Problem of mapping:

Division(x, y) <-> Times(x, Power(x, -1))

according to the rule:

x/y <-> x y-1

My current Implementation looks like:

Equal(
  hasValue Division(
    hasDividend x
    hasDivisor y
  )
  hasValue Times(
    hasValue x
    hasValue (
      Power(
        hasBase x
        hasExponent -1
      )
    )
  )
)

Has anybody a Idea how to handle this asymmetric mapping in OWL/RDF/DAIML+OIL directly to be able to use a semantic reasoner?

]]> http://channel9.msdn.com/Forums/Coffeehouse/107444-Semantic-Mapping-Question/107444#107444 Mon, 05 Sep 2005 11:46:42 GMT http://channel9.msdn.com/Forums/Coffeehouse/107444-Semantic-Mapping-Question/107444#107444 MovGP0 4 http://channel9.msdn.com/Niners/MovGP0/Discussions/RSS