<?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/368"><skos:prefLabel xml:lang="en-US">cubic</skos:prefLabel> <skos:definition xml:lang="en">Identifies the coefficient associated with the cubic term of a polynomial. </skos:definition> <skos:definition xml:lang="de">Identifiziert den Koeffizienten des kubischen Terms eines Polynoms. </skos:definition> <skos:scopeNote xml:lang="en">Used in conjunction with the refType coefficient </skos:scopeNote> <skos:scopeNote xml:lang="de">Wird in Verbindung mit dem refType coefficient verwendet. </skos:scopeNote> <skos:historyNote xml:lang="en">2026-01-05: Created </skos:historyNote> <skos:historyNote xml:lang="en-US">2026-03-18: example updated </skos:historyNote> <skos:example xml:lang="en">
&lt;dcc:quantity refType="force_coefficient force_cubic" refId="calculatedForceCubicIncreasingCompressiveCoefficient_c"&gt;
    &lt;si:real&gt;
        &lt;si:value&gt;8.55847e-20&lt;/si:value&gt;
        &lt;si:unit&gt;\kilo\newton\milli\volt\tothe{-3}\volt\tothe{3}&lt;/si:unit&gt;
    &lt;/si:real&gt;
&lt;/dcc:quantity&gt;
 </skos:example><skos:inScheme rdf:resource="https://digilab.ptb.de/dkd/refType/vocab/"/><skos:broader rdf:resource="https://digilab.ptb.de/dkd/refType/vocab/skos/133"/>  <dct:created>2026-01-05 13:40:31</dct:created>  </skos:Concept></rdf:RDF>