{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "title": "SignatureLine schema",
  "description": "An extension that allows issuers to add signature lines to the visual representation of the badge. This is not part of the cryptographic proof; it is for display purposes only.",
  "type": "object",
  "definitions": {
    "ImageUri": {
      "anyOf": [
        {
          "type": "string",
          "pattern": "data:image/png;base64,",
          "description": "An image representative of the entity. In Blockcerts this is typically a data URI (https://en.wikipedia.org/wiki/Data_URI_scheme) embedded as a base-64 encoded PNG image, but it may also be a URI where the image may be found."
        },
        {
          "type": "string",
          "format": "uri",
          "description": "IRI (typically HTTP) representing this signature image."
        }
      ]      
    }
  },
  "properties": {
    "image": {
      "$ref": "#/definitions/ImageUri"
    },
    "jobTitle": {
      "type": "string",
      "description": "Job title of signer, http://schema.org/jobTitle"
    },
    "name": {
      "type": "string",
      "description": "Full name of signer, http://schema.org/name"
    }
  },
  "required": ["image"]
}