content: {
    "$defs": {
      "Envelope": {
        "description": "Envelope wraps around a document adding headers and digital signatures.",
        "properties": {
          "$schema": {
            "description": "Schema identifies the schema that should be used to understand this document",
            "title": "JSON Schema ID",
            "type": "string"
          },
          "doc": {
            "$ref": "https://gobl.org/draft-0/schema/object",
            "description": "The data inside the envelope",
            "title": "Document"
          },
          "head": {
            "$ref": "https://gobl.org/draft-0/head/header",
            "description": "Details on what the contents are",
            "title": "Header"
          },
          "sigs": {
            "description": "JSON Web Signatures of the header",
            "items": {
              "$ref": "https://gobl.org/draft-0/dsig/signature"
            },
            "title": "Signatures",
            "type": "array"
          }
        },
        "required": [
          "$schema",
          "head",
          "doc"
        ],
        "type": "object"
      }
    },
    "$id": "https://gobl.org/draft-0/envelope",
    "$ref": "#/$defs/Envelope",
    "$schema": "https://json-schema.org/draft/2020-12/schema"
  }