Updated DPLA @context mapping

dpla-mapv3-collection.jsonld

{
  "@context": {
    "dc": "http://purl.org/dc/elements/1.1/",
    "dcmitype": "http://purl.org/dc/dcmitype/",
    "dcterms": "http://purl.org/dc/terms/",
    "@vocab": "http://purl.org/dc/elements/1.1/",
    "admin": null,
    "id": null,
    "_id": null,
    "ingestionSequence": null,
    "ingestDate": null,
    "ingestType": null,
    "object_status": null,
    "originalRecord": null,
    "_rev": null,
    "score": null,
    "validate_on_enrich": null
  }
}

dpla-mapv3-item.jsonld

{
  "@context": {
    "dc": "http://purl.org/dc/elements/1.1/",
    "dcmitype": "http://purl.org/dc/dcmitype/",
    "dcterms": "http://purl.org/dc/terms/",
    "dpla": "http://dp.la/terms/",
    "edm": "http://www.europeana.eu/schemas/edm/",
    "geo": "http://www.w3.org/2003/01/geo/wgs84_pos#",
    "lcsh": "http://id.loc.gov/authorities/subjects/",
    "ore": "http://www.openarchives.org/ore/terms/",
    "skos": "http://www.w3.org/2004/02/skos/core#",
    "xsd": "http://www.w3.org/2001/XMLSchema#",
    "@vocab": "http://purl.org/dc/elements/1.1/",
    "sourceResource": "dpla:SourceResource",
    "aggregatedCHO": {
      "@id": "edm:aggregatedCHO",
      "@type": "@id"
    },
    "collection": {
      "@id": "dcterms:isPartOf",
      "@type": "dcmitype:Collection"
    },
    "extent": "dcterms:extent",
    "temporal": "dcterms:temporal",
    "spatial": {
      "@id": "dcterms:spatial",
      "@type": "dpla:Place"
    },
    "coordinates": "geo:lat_long",
    "city": "dpla:city",
    "county": "dpla:county",
    "region": "dpla:region",
    "state": "dpla:state",
    "country": "dpla:country",
    "stateLocatedIn": "edm:currentLocation",
    "dataProvider": "edm:dataProvider",
    "hasView": {
      "@id": "edm:hasView",
      "@type": "edm:WebResource"
    },
    "isShownAt": {
      "@id": "edm:isShownAt",
      "@type": "@id"
    },
    "object": {
      "@id": "edm:object",
      "@type": "@id"
    },
    "provider": {
      "@id": "edm:provider",
      "@type": "edm:Agent"
    },
    "date": {
      "@type": "edm:TimeSpan"
    },
    "begin": {
      "@id": "edm:begin",
      "@type": "xsd:date"
    },
    "end" : {
      "@id": "edm:end",
      "@type": "xsd:date"
    },
    "displayDate": "skos:prefLabel",
    "name": "skos:prefLabel",
    "iso639": "skos:altLabel",
    "iso639_3": "skos:altLabel",
    "admin": null,
    "id": null,
    "_id": null,
    "ingestionSequence": null,
    "ingestDate": null,
    "ingestType": null,
    "object_status": null,
    "originalRecord": null,
    "score": null,
    "specType": null,
    "validate_on_enrich": null
  }
}