{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/university-of-cape-town/main/json-structure/university-of-cape-town-study-structure.json",
  "name": "DataFirstStudy",
  "description": "JSON Structure for a DataFirst NADA catalog study.",
  "type": "object",
  "properties": {
    "id": { "type": "int64", "description": "Internal study identifier." },
    "type": { "type": "string", "description": "Study type." },
    "idno": { "type": "string", "description": "Persistent study identifier." },
    "doi": { "type": ["string", "null"], "description": "Study DOI, if assigned." },
    "title": { "type": "string", "description": "Study title." },
    "subtitle": { "type": "string", "description": "Study subtitle." },
    "nation": { "type": "string", "description": "Country covered." },
    "authoring_entity": { "type": "string", "description": "Producing institution(s)." },
    "form_model": { "type": "string", "description": "Access model." },
    "data_class_id": { "type": ["int32", "null"] },
    "year_start": { "type": "int32", "description": "First year covered." },
    "year_end": { "type": "int32", "description": "Last year covered." },
    "thumbnail": { "type": "string", "description": "Thumbnail path or URL." }
  },
  "required": ["id", "type", "idno", "title"]
}