Remove knora-dc

[benjamingeer]

This removes the knora-dc ontology, which is no longer needed now that API v2 can use the real dc or dcterms.

Ontologies in webapi/_test_data/ontologies that used knora-dc are changed to use dcterms.

Resolves #729.

[tobiasschweizer]

Maybe you could add a test like the following:

PREFIX knora-api: <http://api.knora.org/ontology/knora-api/simple/v2#>
    PREFIX dcterms: <http://purl.org/dc/terms/> 
    
    CONSTRUCT {
        ?book knora-api:isMainResource true .
        
        ?book dcterms:title ?title .
        
    } WHERE {
        ?book a knora-api:Resource .
        
        ?book dcterms:title ?title .
        
        dcterms:title knora-api:objectType xsd:string .

        ?title a xsd:string .
        
        FILTER(?title = 'Zeitglöcklein des Lebens und Leidens Christi')
        
    } OFFSET 0

->

{
  "@type" : "schema:ItemList",
  "schema:itemListElement" : [ {
    "@id" : "http://data.knora.org/c5058f3a",
    "@type" : "incunabula:book",
    "incunabula:title" : {
      "@id" : "http://data.knora.org/c5058f3a/values/c3295339",
      "@type" : "knora-api:TextValue",
      "knora-api:valueAsString" : "Zeitglöcklein des Lebens und Leidens Christi"
    },
    "schema:name" : "Zeitglöcklein des Lebens und Leidens Christi"
  }, {
    "@id" : "http://data.knora.org/ff17e5ef9601",
    "@type" : "incunabula:book",
    "incunabula:title" : {
      "@id" : "http://data.knora.org/ff17e5ef9601/values/d9a522845006",
      "@type" : "knora-api:TextValue",
      "knora-api:valueAsString" : "Zeitglöcklein des Lebens und Leidens Christi"
    },
    "schema:name" : "Zeitglöcklein des Lebens und Leidens Christi"
  } ],
  "schema:numberOfItems" : 2,
  "@context" : {
    "rdf" : "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
    "knora-api" : "http://api.knora.org/ontology/knora-api/v2#",
    "schema" : "http://schema.org/",
    "rdfs" : "http://www.w3.org/2000/01/rdf-schema#",
    "incunabula" : "http://0.0.0.0:3333/ontology/incunabula/v2#"
  }
}

[subotic]

looks good. maybe add the test that @tobiasschweizer mentioned. thanks.

[benjamingeer]

@subotic Thanks!