Ignore JSON nesting

(I’m sorry if this message will appear on the mailing list twice, but it seems my attempt from this morning did not come through…)

Hi,

I'm working on an open data API which currently can serialize its output to GeoJSON or RDF/Turtle. I'm working on JSON-LD serialization, and ideally I would like to have a @context which I can add to the existing GeoJSON output (together with some @ids and @types), so that both the Turtle output and the JSON-LD output will normalize to the same triples.

Data is organized as follows: each object/feature has an ID and a name, and data on one or more layers. Per layer, there is a data field, which contains a JSON object. Example GeoJSON output:

{
  "type": "FeatureCollection",   
  "features": [
    {
      "type": "Feature",
      "properties": {
        "id": "admr.nl.appingedam",
        "name": "Appingedam",
        "layers": {
          "cbs": {
            "data": {
              "name": "Appingedam",
              "population": 1092
            }
          },
          "admr": {
              "data": {
              "name": "Appingedam",
                "gme_code": 4654,
                "admn_level": 3
              }
          }
        }
      },
      "geometry": {…}
    }
  ]
}

Example Turtle output:

<admr.nl.appingedam>
    a :Node ;
    dc:title "Appingedam" ;
    :createdOnLayer <layer/admr> ;
    :layerData <admr.nl.appingedam/admr> ;
    :layerData <admr.nl.appingedam/cbs> .
<admr.nl.appingedam/admr>
    a :LayerData ;
    :definedOnLayer <layer/admr> ;
    <layer/admr/name> "Appingedam" ;
    <layer/admr/gme_code> "4654" .
    <layer/admr/admn_level> "3" .
<admr.nl.appingedam/cbs>
    a :LayerData ;
    :definedOnLayer <layer/cbs> ;
    <layer/cbs/name> "Appingedam" ;
    <layer/cbs/population> "1092" ;

The properties object does not have its own URI. Is there a way to create a JSON-LD context which takes the contents of the properties into account, but further 'ignores' its precence?

Many thanks,

Bert Spaan