{
    "@type": "PresentationDigitalDocument",
    "name": "Name of the document",
    "author": "",
    "inLanguage": "";
    "encodingFormat": "application/pdf",
    "isAccessibleForFree": "False",
    "url": ""
}

{
    "@type": "PresentationDigitalDocument",
    "name": "Name of the document",
    "author": "",
    "inLanguage": "";
    "encodingFormat": "application/pdf",
    "isAccessibleForFree": "False",
    "url": ""
       "hasPart": {
          "@type": "WebPageElement",
          "isAccessibleForFree": "False",
          "cssSelector": ".css-class"
       }
    }