Work in progress

<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:j.0="http://qudt.org/schema/qudt/"
    xmlns:j.1="http://purl.org/dc/terms/"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="http://qudt.org/vocab/constant/Pi">
    <rdfs:label xml:lang="en">Pi</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://qudt.org/3.1.9/vocab/constant"/>
    <j.0:latexDefinition rdf:datatype="http://qudt.org/schema/qudt/LatexString">$\pi = \frac{C}{d}$, where $C$ is the circumference of a circle and $d$ is the diameter of a circle.</j.0:latexDefinition>
    <j.0:applicableUnit rdf:resource="http://qudt.org/vocab/unit/UNITLESS"/>
    <j.0:latexSymbol rdf:datatype="http://qudt.org/schema/qudt/LatexString">$\pi$</j.0:latexSymbol>
    <j.0:dbpediaMatch rdf:datatype="http://www.w3.org/2001/XMLSchema#anyURI">http://dbpedia.org/resource/Pi</j.0:dbpediaMatch>
    <j.0:quantityValue rdf:resource="http://qudt.org/vocab/constant/Value_Pi"/>
    <j.1:description rdf:datatype="http://qudt.org/schema/qudt/LatexString">
  The constant $\pi$ is the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159.
  </j.1:description>
    <rdf:type rdf:resource="http://qudt.org/schema/qudt/PhysicalConstant"/>
    <j.0:informativeReference rdf:datatype="http://www.w3.org/2001/XMLSchema#anyURI">http://en.wikipedia.org/wiki/Pi</j.0:informativeReference>
    <j.0:hasQuantityKind rdf:resource="http://qudt.org/vocab/quantitykind/Angle"/>
  </rdf:Description>
</rdf:RDF>

@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<http://qudt.org/vocab/constant/Pi>
  rdf:type <http://qudt.org/schema/qudt/PhysicalConstant> ;
  <http://purl.org/dc/terms/description> """
  The constant $\\pi$ is the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159.
  """^^<http://qudt.org/schema/qudt/LatexString> ;
  <http://qudt.org/schema/qudt/applicableUnit> <http://qudt.org/vocab/unit/UNITLESS> ;
  <http://qudt.org/schema/qudt/dbpediaMatch> "http://dbpedia.org/resource/Pi"^^xsd:anyURI ;
  <http://qudt.org/schema/qudt/hasQuantityKind> <http://qudt.org/vocab/quantitykind/Angle> ;
  <http://qudt.org/schema/qudt/informativeReference> "http://en.wikipedia.org/wiki/Pi"^^xsd:anyURI ;
  <http://qudt.org/schema/qudt/latexDefinition> "$\\pi = \\frac{C}{d}$, where $C$ is the circumference of a circle and $d$ is the diameter of a circle."^^<http://qudt.org/schema/qudt/LatexString> ;
  <http://qudt.org/schema/qudt/latexSymbol> "$\\pi$"^^<http://qudt.org/schema/qudt/LatexString> ;
  <http://qudt.org/schema/qudt/quantityValue> <http://qudt.org/vocab/constant/Value_Pi> ;
  rdfs:isDefinedBy <http://qudt.org/3.1.9/vocab/constant> ;
  rdfs:label "Pi"@en ;
.

{"resource":"Pi" 
 ,"qname":"constant:Pi" 
 ,"uri":"http:\/\/qudt.org\/vocab\/constant\/Pi" 
 ,"properties":["applicable unit":"unit:UNITLESS" 
    ,"dbpedia match":"http:\/\/dbpedia.org\/resource\/Pi" 
    ,"description":"\n  The constant $\\pi$ is the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159.\n  " 
    ,"has quantity kind":"quantitykind:Angle" 
    ,"informative reference":"http:\/\/en.wikipedia.org\/wiki\/Pi" 
    ,"isDefinedBy":"<http:\/\/qudt.org\/3.1.9\/vocab\/constant>" 
    ,"label":"Pi" 
    ,"latex definition":"$\\pi = \\frac{C}{d}$, where $C$ is the circumference of a circle and $d$ is the diameter of a circle." 
    ,"latex symbol":"$\\pi$" 
    ,"quantity value":"constant:Value_Pi" 
    ,"type":"qudt:PhysicalConstant" 
    ]}

{
  "@id" : "http://qudt.org/vocab/constant/Pi",
  "@type" : "http://qudt.org/schema/qudt/PhysicalConstant",
  "description" : "\n  The constant $\\pi$ is the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159.\n  ",
  "applicableUnit" : "http://qudt.org/vocab/unit/UNITLESS",
  "dbpediaMatch" : "http://dbpedia.org/resource/Pi",
  "hasQuantityKind" : "http://qudt.org/vocab/quantitykind/Angle",
  "informativeReference" : "http://en.wikipedia.org/wiki/Pi",
  "latexDefinition" : "$\\pi = \\frac{C}{d}$, where $C$ is the circumference of a circle and $d$ is the diameter of a circle.",
  "latexSymbol" : "$\\pi$",
  "quantityValue" : "http://qudt.org/vocab/constant/Value_Pi",
  "isDefinedBy" : "http://qudt.org/3.1.9/vocab/constant",
  "label" : {
    "@language" : "en",
    "@value" : "Pi"
  },
  "@context" : {
    "label" : {
      "@id" : "http://www.w3.org/2000/01/rdf-schema#label"
    },
    "isDefinedBy" : {
      "@id" : "http://www.w3.org/2000/01/rdf-schema#isDefinedBy",
      "@type" : "@id"
    },
    "latexDefinition" : {
      "@id" : "http://qudt.org/schema/qudt/latexDefinition",
      "@type" : "http://qudt.org/schema/qudt/LatexString"
    },
    "applicableUnit" : {
      "@id" : "http://qudt.org/schema/qudt/applicableUnit",
      "@type" : "@id"
    },
    "latexSymbol" : {
      "@id" : "http://qudt.org/schema/qudt/latexSymbol",
      "@type" : "http://qudt.org/schema/qudt/LatexString"
    },
    "dbpediaMatch" : {
      "@id" : "http://qudt.org/schema/qudt/dbpediaMatch",
      "@type" : "http://www.w3.org/2001/XMLSchema#anyURI"
    },
    "quantityValue" : {
      "@id" : "http://qudt.org/schema/qudt/quantityValue",
      "@type" : "@id"
    },
    "description" : {
      "@id" : "http://purl.org/dc/terms/description",
      "@type" : "http://qudt.org/schema/qudt/LatexString"
    },
    "informativeReference" : {
      "@id" : "http://qudt.org/schema/qudt/informativeReference",
      "@type" : "http://www.w3.org/2001/XMLSchema#anyURI"
    },
    "hasQuantityKind" : {
      "@id" : "http://qudt.org/schema/qudt/hasQuantityKind",
      "@type" : "@id"
    },
    "rdf" : "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
    "owl" : "http://www.w3.org/2002/07/owl#",
    "xsd" : "http://www.w3.org/2001/XMLSchema#",
    "rdfs" : "http://www.w3.org/2000/01/rdf-schema#"
  }
}