{
  "required": [
    "description",
    "hasVersion",
    "fullName",
    "shortName"
  ],
  "properties": {
    "custodian": {
      "type": "array",      
      "minItems": 1,
      "uniqueItems": true,
      "_instruction": "Add one or several custodians (person or organization) that are responsible for this research product. Note that this custodian will be responsible for all attached research product versions.",
      "_linkedCategories": [
        "legalPerson"
      ]
    },
    "description": {
      "type": "string",
      "maxLength": 2000,
      "_instruction": "Enter a description (abstract) for this research product (max. 2000 characters, incl. spaces; no references). Note that this description should be fitting for all attached research product versions."
    },
    "fullName": {
      "type": "string",
      "_instruction": "Enter a descriptive full name (title) for this research product.  Note that this full name should be fitting for all attached research product versions."
    },
    "homepage": {
      "_instruction": "Add the uniform resource locator (URL) to the homepage of this research product.",
      "_linkedTypes": [
        "https://openminds.ebrains.eu/core/URL"
      ]
    },
    "howToCite": {
      "type": "string",
      "_instruction": "Enter the preferred citation text for this research product. Leave blank if citation text can be extracted from the assigned digital identifier."
    },
    "shortName": {
      "type": "string",
      "maxLength": 30,
      "_instruction": "Enter a short name (alias) for this research product (max. 30 characters; no space)."
    }
  }
}