<?xml version="1.0" encoding="utf-8"?><rdf:RDF  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"  xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"  xmlns:skos="http://www.w3.org/2004/02/skos/core#"  xmlns:map="http://www.w3c.rl.ac.uk/2003/11/21-skos-mapping#"  xmlns:dct="http://purl.org/dc/terms/"  xmlns:dc="http://purl.org/dc/elements/1.1/"><skos:ConceptScheme rdf:about="https://digilab.ptb.de/dkd/refType/vocab/">  <dc:title>Metrology Database</dc:title>  <dc:creator>German Calibration Service (DKD)</dc:creator>  <dc:contributor>Thomas Krah, Daniel Hutzschenreuter, Benjamin Gloger, Muhammed-Ali Demir, Moritz Jordan</dc:contributor>  <dc:publisher>Deutscher Kalibrierdienst (German Calibration Service)</dc:publisher>  <dc:rights></dc:rights>  <dc:subject>metrology, reference types, digital calibration certificate, certificate of conformity</dc:subject>  <dc:description><![CDATA[  ]]></dc:description>  <dc:date>2023-06-19</dc:date>  <dct:modified>2026-04-10 06:58:36</dct:modified>  <dc:language>en-US</dc:language>  </skos:ConceptScheme>  <skos:Concept rdf:about="https://digilab.ptb.de/dkd/refType/vocab/skos/375"><skos:prefLabel xml:lang="en-US">IPTS-68</skos:prefLabel> <skos:definition xml:lang="de">Die angegebenen Temperaturwerte sind bezogen auf die Internationale Praktische Temperaturskala von 1968 (IPTS-68). </skos:definition> <skos:definition xml:lang="en">The temperature values are related to the International Practical Temperature Scale of 1968 (IPTS-68) </skos:definition> <skos:scopeNote xml:lang="de">Die Temperaturwerte sind in der dargebotenen Einheit des Messgerätes anzugeben. Es wird empfohlen, die Temperaturwerte zusätzlich in Kelvin anzugeben, insofern dies nicht bereits die angegebene Einheit ist (siehe Example Note). </skos:scopeNote> <skos:scopeNote xml:lang="en">The temperature values have to be given in the unit specified for the measuring device. It is recommended that the temperature values are also given in Kelvin if this is not already the unit specified (see Example Note). </skos:scopeNote> <skos:historyNote xml:lang="en">Created </skos:historyNote> <skos:note xml:lang="en">Comité International des Poids et Mesures, Metrologia 5, No. 2, 35–44 (April 1969)  </skos:note> <skos:example xml:lang="en">
  
    Referenzwertwerte
    Reference values
  
  
    
      273.11 283.11 293.10 303.12 313.11
      \kelvin
    
    
       -0.04 9.96 19.95 29.97 39.96 
      \degreecelsius
    
  
 </skos:example><skos:inScheme rdf:resource="https://digilab.ptb.de/dkd/refType/vocab/"/><skos:related rdf:resource="https://digilab.ptb.de/dkd/refType/vocab/skos/5"/><skos:broader rdf:resource="https://digilab.ptb.de/dkd/refType/vocab/skos/117"/>  <dct:created>2026-01-16 21:48:13</dct:created>  </skos:Concept></rdf:RDF>